For me it's just like the company pitch says a smaller, lighter alternative to a 4x10. No problem at all producing lots of low end...definitely has the typical MB low mid thing going on. I'm using it with a 1x15 for the uber-loud rock gig and by itself for everything else. It's very impressive by itself. Two of them and the Tube 800 (I'm using a TTE 800) would be serious overkill for most situations this side of a sports arena.
The process of coming to a conclusion is vastly more important than the conclusion itself.