Heard about it a few months ago and know of at least one reprobate (see above) who has used it. It might be useful to some people but I can see so many potential issues, least of all the quality of whatever it is you buy off there. Ave's comment pretty much confirms another one of my suspicions with this as well: Malware and scrotes trying to rip you off. You think the Internet is bad? Wait until you're using an unregulated AND untraceable network
The prices are basically the same as mid-high end street prices and UK Customs are pretty good at finding suspect packages (I'm speaking from experience here) so you could end up losing out completely. More to the point, I'm pretty pedestrian when it comes to drugs nowadays and don't often adventure further than a quick spliff and a line of Sanatogen.
I guess the site has it's uses if you've got a voracious appetite for drugs and don't know many dealers (or they're all in prison) but most people will just go see the dodgy bastard around the corner for their warez/
The site is buyer orientated, money is held in escrow until satisfactory goods are received, if not, you do not pay.
Although this does and has opened up opportunities for sneaky buyers to rip off sellers.
Tbh the only reason i used it was to get untouched mdma crystal, which is extremely rare in N.I.
I also didn't use the Bitcoin escrow system, took too long to fuck about getting the bc's. I used my spidey senses and read the long positive history of feedback of a well known dutch seller and used another instant pay system, ukash. (although not recommended)