It's ok - but has some issues.
It obviously works since any band around your arm will provide the support, but there are a few things about it that would cause me to purchase a different brand: 1. The edges of some of the parts are sharp and dig into your skin when flexing, 2. The material is completely non-absorbent so sweat will continually drip from beneath the strap, and 3. The Velcro is too strong and I think that the act of un-doing the Velcro will eventually tear the strap.
Rating: 2 stars