Sunsinger is definitely one of the treats of the CU area. It has a great atmosphere, delicious food and, overall, a friendly staff. I've been there many times since a friend turned me onto it and the food has always been delicious. The almond-crusted goat cheese salad is one of my favorite menu items. It has one of the best balsamic dressings I've ever tasted and the combination of almonds, warm goat cheese, dressing and the crunchy salad is perfect. Also try the grilled cheese with apple slices and fig jam inside. You'll be glad you did.
I've had a few cheese plates and their selection of cheese spreads and have been impressed every time. When they have special selections of cheeses they are always well-selected and make for a fun lunch or dinner as they usually range from the more mild to the more adventurously pungent.
If I have one complaint, it's that the service is slow. There is a very relaxed atmosphere in general there and as long as you leave yourself plenty of time you'll have an enjoyable time. I would not recommend going there if you're in a hurry though. They're staff seems fairly small no matter how busy they are and everything comes to your table at a leisurely pace. If you have an hour for lunch or are not on your way to a movie after dinner though, you should be fine.
After you're done, be sure to check out the wine selection. The staff is incredibly helpful in selecting a good wine and will not judge you if you don't know a great deal about wines in general. I've went with a staff member's recommendation on a couple occasions and have yet to be disappointed.