I purchased a brand new external battery from them some time ago. They don't have any more right now. They are in California. They were OK to deal with. Their shipping prices to Canada are outrageous. I have spoken with both Steve and Mario on the phone and get the impression that they are really not too technologically savvy. If you check out the ads for their DT366's on eBay you'll see they are not too professional. They had no clue that there were CF cards in the CF slot till I told them.
I used one of their "Best Offer" auctions and said I would give them their full asking price of $99 if they throw in an extra battery and a charging cradle. (I figured with the exorbitant shipping it made up for it) They accepted the offer immediately, so I sent them an email for clarification of the "conditions" that I had put on the offer. They told me there was no way they could do that deal, and that they had applied to have the transaction cancelled. They thought the attached conditions that I had put in were just a "note". I tried hard to explain to them that they had already accepted the offer and were bound to it. They just didn't understand. They have no idea how eBay works. In the end I just cancelled the transaction and let them have their way. It was easier than trying to argue with them.
I am sure that if you win the auction as is, you will have no problem with them.