Hi. Yes, I have used it recently, to try to reduce wrinkling in my upper eyelids and large circles around my eyes.
The clinic used it on my forehead too, in order to provide some life, and in fact this is the one part of my upper face where I can see some improvement. The lines on my forehead are definitely reduced. The skin at the corner of my eyes is also a little tighter but I don't see change in my eyelids or beneath my eyes.
By the way, the procedure does hurt, and you should allow some downtime (my eyelids sagged markedly for a day or two).
I have tried a number of products like this now. Some were completely ineffective and all are over-sold and, of course, expensive. Thermage does seem to produce some effect, though. Nothing dramatic, though, judging by my own experience.
Was the result due to swelling from the procedure? I have heard that people report an initial improvement in some wrinkling due to the fact that swelling plumps out the wrinkles temporarily, but this is short lived. There doesn't seem to be very much (if any) positive feedback online about this procedure and probably not worth the pain as well.
Oops. Coming back to this thread I see I wrote that, "The clinic used it on my forehead too, in order to provide some life..." That was meant to be "lift". Less dramatic.
Painful. Expensive. Minor improvement, in my case. Whether you feel it worth it depends on what you would be giving up in terms of alternative uses of your money and time, and how badly you want even minor improvement. Speaking for myself, I am open to using it again at some future time if I have money spare after good food, keeping on top of bills, going out, etc.
To answer your questions, it is a type of laser/heat treatment and yes, I think the minor improvements I am seeing are an outcome rather than due just to temporary swelling.