Yes,
I've done business with him a couple of times. However, because of the "legal" issues involved with carrying something like this, I decided to stick to locking carabiners, Stingers, and such...
I think the best model is the Bottle Opener- it's a two-finger model. I wouldn't recommend getting it in the 1/2" thick- it's a beast and too heavy for carrying (I had mine cut into two 1/4" thick pieces and gave one half to the guy who did it). The 1/4" ones are plenty strong...I also bought one of the aluminum ones in 1/4"; I am very impressed with it, lightweight, strong, and you can ask him to put a little hole in the base (the part that fits your palm) so you can rig up a nice little lanyard/monkey knot for easy access.
Finally, I had a couple of the plastic models made...good thing I saw this, I forgot that I want to get the Bottle Opener model in a nice 1/2" piece. I'll have to get around to ordering one! They're a dense, strong white plastic from what I remember- I gave the one I had away, but kept the metal ones. The reason I recommend the two-finger jobs are that you really can't mess up how it will "feel"; the four-finger ones are too much of a 'spread' for me.
Excellent fun stuff, even if you're just a collector; very good service, quick delivery as well.