We use something similar near our sink. I think they work a bit, enough to make me want another one when I'm cutting stuff, which I don't do near the sink.
As for detriments, they can be a slight challenge to clean around. The one we have really sticks to the floor. Good, in that it doesn't move. Bad, if you either would like to move it or want to clean it.
I wouldn't mind getting one for cutting/other meal preparation, but we don't have a place to put it. We'd have to pick it up and put it away, and that might be a pain.