Fast Tech are fine as long as you read the reviews of items and find the one with the most positive feedback. I've had a bit of Shinyitis recently and have spent a fair whack on stuff from them. I will say, if you're gonna buy anything from them, understand that you may have to fettle it and do some work. That being said every item on my last order was perfect and needed nothing done to it, apart from with the Atties needing a good wash to remove machine oil. The Marquis clone especially, when sucking on it to test the airflow and getting that machine oil taste *blech*. The Dimitri is well built, the Fuhattan is so weighty and solid, it could be used as a mace.
My previous order was a little different. The Tugboat v2 I ordered, the holes on the inner adjustable airflow ring were drilled as if the person doing it had never used a drill before. One side was fine, the other, while meant to be open was pretty much closed off, yes it was that bad. Still, I bought it with the understanding I may have to fiddle, for all the hassle it would have been trying to return it, it was easier to get the files out and just extend the holes. Also, never buy anything from there that you think 'Ooh, that's pretty' as I did with the Enigma RDA, you'll probably end up buying a piece of crap.
One last thing, never, under any circumstances, buy batteries or something that has an in-built battery from them, like a iStick. If there is something wrong, you will not be able to return it to them due to postal restrictions on Lithium Ion batteries. If you're gonna buy something like that, buy from the UK.