Does it work? Yes, very well. I've always been happy with my ability to give my wife a massage, but I don't come equipped with a 6,200rpm Hitachi motor with 8 variable patterns. So I bought this and introduced it.
Now when I'm giving her a massage, she'll get so into it that she'll take it right out of my hands, and soon I'm rubbing and touching the less important parts while she works out the problem area herself. More recently the kids were away at a sleepover, and we found ourselves engaged in some mutual massage, and she suggested I could get out that noisy thing I bought (it's not that noisy, but she worries about it), and was disappointed to find it needed to be recharged.
So, I definitely have to say that this product sparked some joy, but also has for the first time left me in the position of feeling sometimes not good enough.