Pros:
As has been said before: beautiful setting in an old, mature Pecan Orchard. The Course starts and finishes at the parking lot. It is a safe park, with the parking lot on a fairly busy street by the college (SFA), so your car is rather safe.
Most holes are open, even when you get into the orchard, so it's a good course if you want to learn, or brush up on, a power drive. Heck, if it bores you and you want to get crazy, make up your own mondos and see if you can weave your disc in and out of the pecan trees (set up in grid pattern)..
There are a few mondos that might (I emphasize might) make you step up your game. The mondo signs/markings could be better defined/highlighted though.
Cons:
As has been said before: the park can get busy, but the people are friendly; if you want time your game when people won't be there (school hours, late morning / early afternoon).
There are minimum bathroom facilities (I couldn't find any -- they may be around the play area and not near the disc golf course), but plenty of corners and trees if you must...
Baskets need a fresh coat of paint on the top blaze and numbers. Several signs are missing, but many of the next tee pads are so obvious it is hard to miss (2 or 3 can be confusing).
The tee pads are dirt (filthy, East Texas red clay/dirt) and pea gravel, and tend to not get filled in regularly, so there's a ditch or a puddle of water/mud in the middle of them if it recently rained... Seriously though, don't wear anything you won't want red dirt on, especially if you go into a creek ditch for a disc.
The park is in a flood plain, so water tends to stand for days after a rain, especially in winter when nothing is soaking it up. The back holes (15 - 18) stay wet the longest and will be marshy for DAYS after a good rain. This isn't as bad as the neighboring disc golf course at Pioneer Park, though, where you might have to forfeit playing 6 or 7 holes.
Most holes are very open: they use the pecan trees often, but most shots are more distance/power intensive than technical.
Other Thoughts:
It's hard to do anything about being in the lowlands, but If the local club, or whatever they are, would get the money for new signs, basket paint (maybe some chains?), and either keep the tee pads groomed or slowly replace them all with concrete, the course would be much better.
Hole 9 has the sharpest dogleg/hook (left) I've ever seen; it is also common to land in hole 10 fairway on this drive. In fact, holes 8 - 11 are crammed into a corner.. kind of sucks, but I guess they worked with the space they had. It makes for a couple technical shots, though.
Hole 11 has a crazy-cool double-mondo shot between two trees.
The long, open holes might get monotonous to some (and indeed would for me if I lived in Nacogdoches), but I enjoy the chance to bomb a lot (most holes at my home courses are tight/wooded). Besides, that's what traveling disc golf is all about: seeing how other places utilize the land they have. And as far as that goes, I give Pecan a thumbs up: might not become a favorite or an out-of-the-way stop, but if you are: close, have the time, and weather permits, you won't regret spending a couple hours.
And if it's that time of year, take a sack and pick up pecans all you want. Hope this helps.