I haven't, but I think some other guys in here have. Seeing as I didn't give away any of my credit card details there, the question will not be if I trust the website, but if I trust the people behind it, which are VKB.
I'll see how things progress whether I'll go ahead with the payment or not. It's been two days since I got the automated email saying they'd contact me, without them doing so. But since we're coming off holidays I'll cut them some slack.