anyone used this nice looking putting aid?

[Jimbooo]

http://thesmartgolfer.com/products/

Anyone used this or has an opinion on whether it might be worth it? Looks pretty good but I can't find it available in the UK - can get it on ebay tho from the US.

 

[Losttheplot]

Personally I wouldn't like to use it. It will add weight to the putter giving an unrealistic feel when you take it off to play on the course.

It sounds a good idea but I wouldn't personally try it for that reason alone.

 

[G_Mulligan]

Don't buy it if you putt off the toe or off the heel