Here's my take. I bought a pair a couple of months ago so that when the wife takes over the mancave on laundry day I can still practice.
They sound surprisingly good, with a fair amount of bottom, but the louder you turn up the volume, the noisier they get. Obviously they aren't going to sound like a full stack, but if you keep them at a moderate volume they work pretty well. The compression effect seems to work but the more you turn up the effect, the more noise you introduce. The cord is really thin and seems like it could fail if you aren't careful. So, I slit a piece of silicone tubing along its length and put it over the cord then secured it with a couple of cable ties so as not to need to worry about the thin cord. The cord isn't long enough to go behind you into the jack, but in the front it is short enough that it won't catch on anything.
They are light, running off of two AAA batteries in the right earpiece and the electronics in the left side, and reasonably comfortable. They also fold flat so I can fit them in my case along with a strap, which in this case makes a complete rig. These would be ideal if you find yourself in a hotel room and need to practice but don't want to rattle the windows. Or if your wife kicks you out of the mancave so she can do laundry....
Overall, I'm pretty happy with them, here's a pic of them in the case:
