Any good or just another gimmick?

[cantpotforshíte]

pseudo-science, quackery, and about as much use as an ashtray on a motorbike.
IMHO

[checkSide]

there are necklaces that do the same thing that are used quite a lot in golf, though the only thingi can see them useful for is as a necklace to make sure you keep yer bloody head still and not moving about as any movement will make it swing about

YOU MEAN THESE.

[andy carson]

YOU MEAN THESE.

thats the ones...

all voodoo and loony science to me though

[The Doctor]

I know a lot of people think this is a gimmick but I have found that it does in fact help your strength and balance. also very good for people with joint problems.