I use fasttech, so far so good with them bought a few mods, and quite a few atties.
Points to remember when you use them:
1. Don't expect to get anything within two weeks, unless you pay silly postage costs.
2. If you use their currency converter, on the page, you'll find it comes out as a few quid more.
3. Watch the exchange rates, if you time it right you can get a cracking bargain.
As I mentioned I've got another squeeze on the way, costs somewhere in the region of £13 for it. Squeezes are great for me, I like 22mm single coil atties and for that they're great. They fit in a shirt pocket, with ease and they just work (apart from my dearly departed friend).
Best of luck with it.