I bought this having already found and bought the twin speaker version from someone second hand, and I was so impressed with the twin version I didn't even hesitate in ordering one of these for my smaller shows and gigs I have upstairs.
First outing with it I was playing to around a 100 guests in a room that would easily hold 150/200, I was not sure how I would get on but WOW this little box is heads and shoulders above all other 12" single cabs I have used in the past including (DB Tech, EV, Alto) since that first gig I have used this many times and found it to be really good far better that its size would lead you to think.
Now it is loud, and is amazing but its is only a 12" speaker so do not expect a huge wall of sound to hit you but it is way way better than all the more expensive units I have tested in the past, and so light to boot I am a big guy but can just about manage this as a one handed lift, the handle though are well placed for a nice easy carry to the upper floors of a venue.
I plan to buy a second unit when they return in stock giving me the best of all worlds as I have said I already own the twin ver so stacking two singles will give me a large balanced rig when the needs arises to wake the dead.
in short would I recommend this YES!
EDIT Sept 2015 I now have two of these and a dual unit so happy great unit used 2/3 times a week all fine so far thanks Thomann :-)