Pros:
The thing you need to know most about Heritage Park DGC: has the hay been mown? This course is completely different from mid-fall to mid-spring. When they cut the long grasses, 2/3rds of the holes become open shots, with practically no chance of losing a disc. You have to decide if you like the challenge of keeping it out of the stuff (in the summer), or like me (a relative noob), actually prefer this course mown.
This course is set in a nice, level floodplain, with other sports fields and the obligatory jogging path winding around, adding some optional OB challenges, if your shots go really wild. There is a cool looking playground by the parking lot, and a new deck off the path, overlooking the stream on the left after hole 13. Most of the course has good signage, there's a good map kiosk, at least one beverage machine, trash baskets here and there, and one bench on the path near the #9 tee, if you need a break.
This course has some of the neatest concrete tees I've seen: they're oval/teardrop shaped, with a foul line marked, allowing you to follow through without stepping off the front. The baskets are almost all 24 chains, and catch very well (#11 and #16 have only 18 chain baskets).
If you prefer some obstacles, there are permanent shrubs to work around on 2, 4, 7, 9 & 15 (stay outta them bushes!), holes 12 & 16 shoot into the woods, and holes 13 & 17 require tight tee shots out of the woods.
Cons:
Every time I've been here, there's a Civil War re-enactment going on just across the water. Well, maybe it's just a shooting range, but if you feel at all skittish about a near-constant barrage of gunfire nearby, you might be a little distracted here.
There's no elevation to speak of (wait, you cross a drainage ditch on hole 11!).
The course can feel a little ho-hum and bland in the winter (but on the bright side, as of 12/9/12, they have not pulled the baskets for the winter, so there's a course here - and that is good).
Other Thoughts:
The course design flows fairly well, with only one walk out into the field between 13 & 14. In the peak of the summer, I'm sure most holes are forced blind hyzers and annies. It would be interesting to analyze the change in average scores, depending on the season.
The current pictures show 2-3 foot tall bushes, and do not indicate the tall grass potential very well. Since those bushes are now 6-8' high, and very thick, some aspiring photographer needs to update the course pics with one set for the winter, and one set for the summer.
Edit 9/18/14: Having just played Heritage for the first time with the grasses in their seasonal 6 foot plus height, I must say it IS a more challenging course. You'll want a spotter if you go for the riskier lines, and you may have to settle for more threes if you play smartly in all the fairways. The angles of the teepads become more obvious (laid out by a rhbh player?). And the terrible position of the tee sign to the right front corner of hole 6 stands out even more. Also, there is word that the park wants $5 for a day pass (slightly more for all season), but they don't seem to have a collection booth, so take that as you may.