So I've had the chance to test my newly purchased SM at a few full volume rehearsals and....so far I don't love it. Don't get me wrong, the combination of tone and output for a box of its size is incredible. However, I did find that the low end output was not quite satisfactory for my needs, even with bass EQ adjusted (and it took some time to find an EQ I really liked with the cab with my Streamliner head). I also have to push my amp harder than I did with my last cabinet (Markbass NY 122) to keep up with my (fairly loud) band - not excessively hard, just harder than before.
I have a few gigs coming up soon, so I will be testing the SM in live venue situations to continue to feel it out. Unless I fall in love with it, might be looking for a trade for a SC or BB2 (or maybe the Retro 210 would be more to my liking) if they would be more suitable one cab solutions for me. Sorry if it sounds like I'm raining on the BF parade - and I might end up keeping the SM and be very happy with it - but just thought I'd share my initial impressions.