I've got one, and whilst it does take some getting used to having the camera hanging round your hip, it's a vast improvement on a neck strap, and infinitely more convenient too.
The quality of materials used and sewing is spot on, and the only downside (personal opinion) is the bracket to fasten it to your camera... it's just a bit 'industrial' looking, but works perfectly fine.
I'm using mine with the Black Rapid FastenR-T1 so I can keep the tripod QR plate on the camera