They're great -- I'm a huge fan. I've noticed that sometimes their sell prices can be drastically lower than the buy price, so keep an eye out for that, as you could probably sell your Bitcoins elsewhere for more money. This was last week during the crash, so I'm not sure if that affected anything (probably did.) I'm not sure if this is the case anymore, but I'd rather warn you and let you be aware of it potentially happening, than have you lose out on money for your Bitcoins.

Good luck!