I made the mistake of buying two of their DIY "kits" which I'd call spare parts kits. I thought it would be sans PSU and not assembled, but, there's no case. The blades were not tested before shipping and you have to swap them all around because some run in some I/O Board slots and not others. The only good thing is that I get to use a good quality Corsair AX1200 PSU instead of the junky under powered PSU they provide. Also, you only get 2 fans instead. It's a total ripoff since they leave out about $250 in parts and only discount it about $100 and you're left with a breadboard miner that you cannot stack. I'll never buy anything they call a "kit" again