My only complaint about that site is the packing. They sent all my chips (14 chips) in a single ziploc sandwich bag in a bubble envelope. One of my 9/11 chips had a small chip in one of the edges that I think occurred in shipping. Not enough that I bitched to them about it, but definitely kind of annoying.
I'd request a little extra care in packaging the next time I ordered from them. But besides that they're a great site.