Pros:
This course has not only a practice basket, but a practice hole with two tees at about 300' and 350'! A great warmup for the arm and some practice with all of your discs before heading out for a great round on a great course.
As far as disc golf in the Lower Mainland goes, this course is as good as it gets! Lots of variation in the holes (wooded, possible water, uphill, downhill, doglegs left and right, tight and wide fairways, etc) makes for a really fun round where you'll need to use all your shots. The locals are very friendly and will help you out if you're searching for a disc, or need some help with navigation.
There are also two sets of tees for every hole, but I recommend the longer ones as they are more strategically placed for a better challenge on most holes. Some of the notable holes include:
-A wide open tee shot down the hill on 2.
-A long dogleg left on 8 that you'll struggle to get 3 on.
-13 is a bomb of a shot that you need to clear a lengthy grove of tall trees off to the right to get to the main fairway for a tough upshot.
-An extreme elevation shot on 14. The basket can't be more than 100' away, but if your tee shot rolls back down, you're looking at a bogey.
-Several tough wooded holes. 16 especially is an extremely difficult tee shot that is a tough par.
-17 is your chance for an ace. A short downhill shot guarded by some trees, but a well thrown RHBH hyzer will put it on a clear path to the basket.
Cons:
I really wish this course had a few true par 4s. You will certainly make several bogeys during your round, but they will most likely come from a tee shot into a tree, or a missed putt from 20'. There is plenty of room for a couple of 600'-700' holes, or even a tough dogleg in the woods that requires an accurate tee shot in terms of distance before leaving 250' to the basket (just an idea).
Though the course flows well, it can be difficult to navigate as there are no signs anywhere. Print off a map, or take a picture of the one by the parking lot, and take your time investigating where each basket is before teeing off - some of them are hidden quite well and you may be surprised to find that you're way off.
There are no garbage cans throughout the course, and the tee pads are just carpet on gravel.
Other Thoughts:
Don't miss this course if you're looking for the best disc golf in BC. The courses in Vancouver itself can be fun for safari players, but Langley Passive Park is a legitimate disc golf course. Enjoy it!