My wife and I have owned several massagers over the years. The Acuvibe Softtouch Massager is by far the best we've had. It is surprisingly powerful for such a small form factor. Don't let anyone tell you it is quiet, because it is not, but it isn't a showstopper.
It only has 2 settings and for me, on the bare skin, the high setting is almost too much. It works while plugged in, but the cord is not quite long enough, so have a small extension cord if you intend to use it far from an electric outlet. For what its worth, my wife says this is her favorite device we own.
Pros: Powerfull
Cons: Short cord
This review was written in the old system and had content requirements that are different than reviews written today.