I have never used them, but I get a lot of stuff over the internet from the channel islands, motorcycle parts, dvd's and any thing else I can get because of the lack of vat.
They must be really geared up to internet selling over there as usually my orders are here in a couple of days.
I live on the IW and the internet is a great way to get to a wider market so they would be silly to mess you about as they cannot have a big customer base with the locals.
Go for it, after all your credit card gives you insurance if it all goes wrong, let us know how you get on.