PROS:
He knows his ARs
He puts uppers/lowers together to spec
He knows how to troubleshoot and fix an AR
He has TONS of parts at a fair price
CONS:
Typical Gypse gun dealer, makes the rounds of the shows
Has parts of questionable origin/make
Often does not have an upper in a given configuration
No waranty unless you can buy on Saturday, test that day, and catch him Sunday for problems
Tony is one heck of a nice guy, he's always at the C&E show in Richmond, which is where I go to get parts from him. I did buy an A2 HBAR and a bull barrel flat top upper from him a few years ago, and they were fairly price and worked well. I have since sold both and purchased a chrome lined bore BM A2 and a RRA bull barrel stainless, since Tony didn't have chrome bores when I was in the market and the flat top bull that I bought would not deliver MOA accuracy (new one does 1/2 MOA). The A2 is still going strong in my brother's hands, though, many thousands of rounds later. The guy that I sold the flat top bull barreled one to through GunBroker never complained.
I guess the short answer is, if you don't really care where the parts are from, as long as they're in spec enough to work and blast, it'll probably do fine for you.
Remember, in the gun world, like cars and cosmetic surgery, you get ONLY what you pay for, and nothing more. That said, I always buy small parts from him, usually every Richmond show, but I've decided that when it comes to uppers, my taste and $$ is running more to accuracy and I really want to know where all the parts came from in the barrel/upper/bolt/carrier. I've had too many problems with (name of a West Coast AR manufacturer) out of spec and other mil reject/de mil stuff breaking on me.
Tom