Sturdy and well constructed. A bit heavy though, needs a sturdy stand, and probably without the use of a boom arm, at least not in a very open angle.
One of the clips that keeps it open was not in the right place to lock with the screw in mine (about 2mm off), easy to fix with a steel cutter, but had I not the powertool and the knowledge to use it would render that lock unscrewable, hence the whole contraption a little less well-locked, but by no means problematic. Same goes for some pre-drilled holes on the part that attaches to the mic stand, bit out of place.
Had not time to test it yet, but the foam is thick and dense, don't know which frequencies are absorbed and which are reflected (maybe some super highs are reflected, that's how dense it seems to me). Consider buying some foam panels of various density, shape and thickness to experiment with.
Obviously, a bit hard to have a score or a lyrics sheet right in front of you, I must train my customers (and myself) to strategically place the music stand above, below or around the thing.
I would love if there was a top and bottom part to absorb reflections from floor and ceiling, I think it can be achieved with minor design mods on the existing model.
All in all, it's built to last, the option of easily replacing the foam makes it usefull for a variety of situations, and it probably saves you from tampering with your room acoustics and the use of de-reverbing software.