Tank Protector recommendations?

I've started doing some research into tank protectors (the ones that can top your belt buckle scratching your tank), and have not found much range out there...mainly found some budget items like MCA and PRO-GRIP...
has anyone fitted a tank protector and are they good long term? i.e. they don't deteriorate/unstick...
what brand
how much
where from ?
has anyone fitted a tank protector and are they good long term? i.e. they don't deteriorate/unstick...
what brand
how much
where from ?