(Almost) ideal layout and use of available land.
Some really cool holes.
Doesn't fall victim to the curse of so many new courses in that the fairways are perfect, not a mess dinged-up trees and "throw and prey" shots.

Anyone that puts the course's length as a con is just being silly; the first sentences of the course description warn of the course's length and that it is meant to challenge skilled players.
That being said, the designers could make a few alterations to accommodate the other 90% of avid disc golfers.
A short tee could be added to a few holes, but, please only when it makes for a good, entertaining hole. Nothing worse than forced tee boxes.
There are also 2 spots where the course has to connect holes 7-11 to the rest of the course. Unfortunately those connections were filled with 3 terrible holes...
Hole 6, the 1000 footer, is not a very good hole and should definitely be divided into 2, more interesting holes. The other spot the course has to fill in the gaps is the space that makes up holes 12 and 13. These are two wide open, flat, boring, hot holes. This can be fixed by having hole 11 use 12's basket and get rid of hole 12. (We added a hole back at 6 so it works out). Maybe 13 can be changed but having only one wide open, flat, boring, hot hole in a row isn't so bad.

Also the baskets, old school...

So close to being a phenomenal course. Most of the old reviews mention the poor condition of the course, that is no longer an issue whatsoever. The course is perfectly maintained.
If I could throw 450' this might be my favorite course but like any average chucker I typically throw between 300' and 350' on the course.

Armco Park in Lebanon, Ohio (not to be confused with the Armco Park disc golf courses in Kentucky) is a breath of fresh air for those that wish to stretch their arms between Cincinnati and Dayton. Surrounded by only par-3 courses within 30 minutes, players are now able to challenge themselves with a 792' par-4 with brutal rough lining a narrow fairway, a 388' steeply-uphill dogleg-right par-3, a 1084' OB-lined monster, five par-3s over 400', and a 615' par-4 that is of course very much uphill. The course is relentless, challenging your stamina with length and elevation and challenging your shot selection with trees and OB. The loss of the Turtlecreek course across the street turned out to be a blessing is disguise, for the donation of the Mach II baskets from that course led to the development of Armco's course.

AS OF THIS WRITING there are well-designed concrete columns poured where bridges will be installed on holes 7 and 18, and discs are about to go on sale at the existing on-site golf pro shop. A full-service restroom is conveniently located to your right after you finish hole 7, and that same restroom is located straight ahead after you finish hole 10. Porta-potties are also available on your left as you play hole 11, and in the parking lot near 14's tee. I hope they never move the porta-potty near 14's tee. Whether you park near hole 1's tee or hole 18's basket, you should be able to spot a full-service restroom from your parking spot within 150 yards. A drinking fountain is near the road left of hole 11. Make no mistake - this course has excellent facilities.

What should you know before playing? First, bringing a sacrificial disc or two is a good idea. The lake on hole 4 shouldn't really be in play (it's farther away than you think), but maybe don't tee off with your favorite disc. Hole 18 definitely has a lake in play off the tee. Other than those two drives, you shouldn't have to worry about losing a disc at Armco since the rest of the water is in the form of creeks. Next, get it in your head that when you get to hole 15, you won't walk toward the basket after your drive and fall down the hill, but will instead take the path on your right.

STANDARD OB RULES
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ROAD RULE: FOR ALL HOLES, ON OR OVER ANY ROAD IS OB.
FENCE RULE: FOR ALL HOLES, OVER ANY FENCE IS OB.
LAKE RULE: FOR ALL HOLES, SURROUNDED BY WATER IN ANY LAKE IS OB.

ADDITIONAL OB RULES
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Hole 2: Creek is OB.
Hole 3: Treat road in front of tee as an OB river.
Hole 5: Treat road in front of tee as an OB river.
Hole 7: Creek is OB.
Hole 8: Creek is OB. Picnic shelter is OB.
Hole 11: Mando - stay right of large tree.
Hole 14: Creek is OB.
Hole 15: Creek is OB.
Hole 18: Creek is OB.

Wow these Mach II baskets do not catch well! I use a Mach II at home for putting practice and I can tell you that the Armco Mach IIs are particularly talented at accepting discs right in the center of the chains and spitting the disc right out the back.

Hole 2: Crossing the creek requires a bit of planning and execution.

Hole 3: The righty forehand or lefty hyzer line goes over a road with marked parking spots, and I have seen cars fill those spots. It's a great hole design on paper, but having to throw over cars at times is a no-no.

Hole 7: The basket is not far from a playground, and unsuspecting children are drawn to the basket where 300' drives approach. A fence between the playground and the basket would be a notable safety improvement.

Hole 8: The basket is in a fantastic location next to a cool little waterfall, but it is also blind to throwers and park goers will definitely visit the waterfall, which is a recipe for disaster.

Hole 11: This was designed with a mando in mind, but as of this writing the mando isn't marked yet. Because of this, players may throw a "layup" line toward the basket as opposed to playing through the clearing in the trees where the tee pad is aimed. Throwing toward the basket from the tee pad causes the discs to fly near a shelter and its associated entertainment radius.

Hole 14: This was an old dump site for the park, complete with discarded outfield fencing, barrels, concrete, and a variety of other trash. It definitely looks like an exploded meth lab. In some ways I hope it never gets cleaned up because I chuckle every time I play this hole, but it isn't safe. Watch your step, and more importantly, even after its cleaned up, be sure to refer to this as the exploded meth lab hole.

Hole 15: If you don't notice the path to your right and walk down the hill toward the basket, the hill is surprisingly steep and slippery, and your chance of leaving with a muddy skidmark of shame is high.

Hole 18: Fishermen aren't yet instructed to avoid this area and may be present on course. I have seen a fisherman on a boat that was definitely in play. Even after no fishing signs are installed, unless the park also places a no boating sign on a buoy, boats may be present.

Navigation is difficult here since you can't always see the next tee pad and its signs from the basket. The park has added next tee arrows to each basket, but I would recommend using the UDisc overhead map to ensure a good experience if this is your first time.

This course goes a long way out and comes a long way back as you play, so it is not suitable for much else other than playing the full 18 holes.

Armco park has an odd closing procedure, as they define an explicit park closing time that changes with the daylight. I suppose this is better than stating the park closes "at dusk" since that is a bit ambiguous. Nevertheless, you should endeavor to start your round with the closing time in mind. A solo round takes 1.5 hours.

Between Gulley and Armco, Warren County Parks really know what they're doing when it comes to disc golf courses!