PBmining's drawback for me is the reason I don't use it. That's also why I use cex.io, but that's another story.
what did you mean with drawback mate?
cex.io is worse i think, their price is expensive and their fee is crazy
I completely forgot to specify the drawback xD
The drawback is I can't actively trade and withdraw, which I prefer. I use cex.io for the trading profits.