Why are there not better thumb rests available? This is probably the best clip-on rest but you need to hold it in place with a blob of plasti-tack. Also, these rests don't last forever -- the clips break after a while. I suggest therefore that if you can't play without a rest, you buy a few extra as spares. In short, this is a cheap and viable solution to the thumb rest problem but not a perfect one.
This was to replace on.e I had broken and it works perfectly
A must for every beginner! (although I try not to be hooked on using it forever...just for the little extra bit of safety)