I've owned one of the 102 Energy cabs (4 ohm version) for almost two years, and I absolutely love it! I pair it with a Mesa D-350 in order to get the full 350w amp performance from a single 2x10.
The good thing is that any time I've got a gig where the stage is humungous and the rig isn't quite powerful enough (which is, admittedly, an experience I've had only a few times since getting the new cab), there's either a provided backline of appropriate size, or else I get a personal stage monitor, wherein I can get a decent helping of bass in the mix.
The cab is stupid light, and sounds exactly like my old MB cabs (I had a NY121 and Traveler 121 for nearly 10 years), which I finally sold not that long ago. Don't need them anymore!
My one concern is whether this composite material is robust enough to survive heavy gigging life. Even though I've had it nearly two years, it still doesn't feel like a very large span of time to measure longevity. I've had zero cause for concern so far, but it's the one thing still in the back of my mind with these cabs...