I originally bought one of these and one QK-2B to compare them side by side, so my review will be based on that comparison.
The adapter works. It does its job; you can use it to connect and disconnect a microphone very quickly and easily from a stand.
However it feels flimsy; the body is mostly plastic, and it doesn't feel very high quality.
When a microphone is connected, the adapter feels wobbly; I assume because of the built-in shock mount. Still, wouldn't trust it with any expensive microphone.
It's one advantage would be that it is shorter than the alternative, which can be of advantage but I'd rather not mix adapters in the studio since that would defeat my main purpose (being able to quickly put any mic on any stand).
It's worth mentioning that since the initial comparison I've bought several QK-2B's, to the point that I have one for pretty much every mic stand, clamp and microphone that I own.
All in all, I wouldn't say this is a bad product. The feel may be a bit on the flimsy side, but it does its job and I have had no real issues with it. Still, is o recommend the alternative, as I find it better in all ways.