Pros:
The grounds here are very well kept. The grass was mowed and the area was free of litter.
The courses makes use of the little bit of elevation change well. Holes 7 and 10 are really fun downhill tee shots.
This course is pretty open and fairly long, so the big arms really get a chance to air it out.
The scenery here is amazing. The course offers some very nice views of the nearby mountains.
Cons:
Without a whole lot of varied terrain and vegetation, there isn't a great deal of intrigue. To counter that, the designers brought a road into play as OB, and even have a fairway playing over a park sign. This makes these holes feel somewhat forced.
The back nine in particular can get really repetitive. Most of them are just over 300' over flat ground.
With the exception of a couple holes, there is very little punishment for bad tee shots. For most holes, it's just a question of whether or not you can put a shot into putting range from the tee using your own preferred line. If you can't, you'll likely end up with a three.
Navigation can be a bit tricky. The flow of the course is not entirely intuitive.
Other Thoughts:
This is certainly not a bad place to play. With the upkeep of the park, the course is in very good shape.
A round at Glen Helen is certainly enjoyable, but won't be overly challenging. On most holes you can choose the line that works best for you, rather than letting the course dictate the best line.
Be prepared for wind, it can really howl through here.
Given the opportunity, I would definitely return to this course. Just not on a regular basis.