Let's try not to be too negative about them... They are what they are and its not going to achieve anything by chatting about how they mix on here... its up to the punter if he/she wants to hear them play and its up to the promoter to book them if he/she wants them to play at there event.
I've heard many DJ's play sloppy sets and get away with it so I don't let it bother me. If they are where they are without mixing perfectly then fair play to them... they must promote themselves well or something!
They love the music and they give it there best shot... you can't ask much more than that. If you don't like em... don't listen I guess.