LOVE my P7
I have a P7 with (1) 8-channel expander. I LOVE this mixer! I did get it into security mode once, but a quick check of the securty code I had written in the manual 10 years ago fixed it right up. Once you have the security code, change it to 1111 - you'll never forget it.
The mixer is quiet, versatile, and the midi automation was always a HUGE help when I was doing analog. Now that I'm recording digitally, I rely on the P7 to give me the warm, friendly sound I like!
I had a major label producer in the studio, and he said that the mic preamps in the P7 are the same as the ones in one of the Trident consoles... the "B" series, I think he said.
In any case, it really sounds good.