Beautiful design & easy to use, but it's almost too intense/doesn't have a low enough setting to get any sort "build-up". It's also pretty loud, so if you live with others and have thin walls be conscious of that.
A friend of mine bought me this product and I was so amazed with it that I decided to buy it to all my best friends. Absolutely brilliant! First time I get to sweat all by myself. Would recommend it to every woman :)