Go Eff Bee Oh!

Other than that, I can't really help you. I never flew out of either DVT or SDL. I know for a fact Chandler Air Service at CHD is a quality operation, but that may be too far from N. Phoenix.

There was a club I was looking into based at DVT. The rates weren't bad, and they had instructors there. It may be worth looking into it. Here's the address: Valley Flying Club - Phoenix, Arizona
I don't know if it's a quality club, but seems like it could be a good thing!

Sorry I couldn't help more.