I never buy into over-hyped products and claims for Health, food, etc. Never!
I build advanced composite "things" and have been suffering arthritis in the left hand and fingers. Couldn't snap the fingers on the left hand to save me.
Well I received the Tommie Copper fingerless gloves for Christmas. First impression is how can I wear these things working or in public or sailing? They don't look like they will hold up in my daily use.
I put the left hand glove on and to my complete surprise was able to snap my fingers! Take the glove off, no go.
If I have to wear these things under another pair of gloves, so be it! For me, the biggest non-believer, they work.
I have not yet tried to hold or manipulate tools yet. If the very least they provide is post work relief, they are a total success!