Pros:
-Lots of fun elevation shots
-Baskets are in good shape
-Friendly staff
-Discs and food available at pro shop
-Lots of events to participate in
-Windy
-Greens and sandtraps are OB making it more challenging
Cons:
-Grass tees are not fun
-Windy
-Long waits for ball golfers to finish holes at times
-Pay to play (not too bad, keeps grounds up)
Other Thoughts:
Another Disc Golf on a Ball Golf course! Sun Valley is a great course to practice in the wind, and bigger elevation shots. It also helps to thin out the crowds a bit from Morley Field, which is ALWAYS outlandishly crowded.
The tee shots at SV are very fun, throwing up down and across small valleys. And the staff are very pleasant. Moderate amount of well placed vegetation to protect the baskets and add to the challenge, as well as the OB make SV challenging.
The only thing, other than the tees, that annoyed me when I would pay at SV is the ball golfers. It is a pitch-n-putt ball golf course, so you get the guys that bring their friends out that have never played before, and sometimes they have no desire to allow the more serious and competent disc golfers to play through. Generally, everyone is in a good mood though. If you're in San Diego, I would definitely suggest playing Sun Valley over Morley Field, it's just more fun.