I just ate at Center Bistro today. I must admit that I have not really tried any of the restaurants in the renovated area of Tempe (other then the big ones). I had the special of the day which was the encrusted Salmon. WOW! It was cooked perfectly, and served atop brown rice. It also came with fresh squash, which was also cooked to perfection. The food tasted so fresh.
In addition to the Salmon we had fresh Humus and crusty bread, and delicious green tea.
The overall environment inside the restaurant seemed nouveau/tech. Comfortable, but great for a business meeting. The staff was extremely friendly, and it had the atmosphere of a place where a lot of regulars hang out. In fact, the owner of the building and his son both were in the restaurant, and both seemed genuinely nice.
I definately recommend it. I am taking a friend there later this week (he is a total foodie), and will get a second opinion