Polygon, I bought the diamond lifetime membership...I think about 18 months ago and just now finally got to go!
It was AWESOME. Bear in mind that I owned my first handgun as of Christmas, 2011. I'm a newbie. But I felt so comfortable with my gun by the end of it, it was just great. The instructors know their stuff, but also know their audience. They don't come across as anything but professional.
I was also pleased to win the man vs. man competition.
The most enlightening was the morning of day three where we cleared a "house" of paper targets. The two days prior of training went completely out the window and for some reason I only took head shots the entire time
I'm going to convince my brothers and dad to buy memberships as well. The next time I go, hopefully it'll be with my wife.