Anybody tried one of these butt plates?

[Tone]

Crapbay, "Adjustable metal butt plate pad for Air Rifle mk2, Airgun ,HFT sport" selling for just over £100!

These look like they will do the job fine and are not too much money for what they are.
Has anybody tried one?

I use these and have replaced the MEC II with one.

As much as the price is good I like the simplicity and the fact they are light aswell.

Cheers