I have to admit that Vesalia is kinda crappy in the subject of answering e-mails, however they do help you if you have any trouble after you buy something...
I bought a Cyberstorm MkIII from them, which after some correspondens turned out to be DOA, and so I sent it back to them. After 6 months, I got it back in functioning order... The long wait wasn´t their fault, since they sent it to DCE...
I have ordered from them 4 or 5 times, and their deliveries are always fast enough for me, about one week after i payed in advance. ( You can also pay on delivery or with Paypal, i think... )