Yes I recently purchased a Sciaticalm device and I love it !! It has helped in so many ways. I use it on my knee and also have found relief on my back (which it was obtained for) but have also found it helps with my thumb !! The knuckle is really sore and I have had therapy and hot wax treatment but Sciaticalm has helped it more. On the point of the straps I use the small one for my knee but don’t find the big one useful at all. I end up holding it place on my back with the aid of a cushion and with my thumb I just hold it on the knuckle and lower joint. You should look into this as, if I have found relief maybe others would too for other conditions such as Arthritis and joint pain in general. I would be willing to discuss this more.