Putting Grip ? How do you grip a putter ?

For iron, I am using interlock grip. But base on my coach, when putting you are use any other grip and not necessary stick to interlock. Whichever way that's comfortable.

Recently I come across this link http://atruegolfer.com/2012/02/how-to-hold-putter-8-correct-putting-grips/
I'm surprise that the claw putting grip and I try it out.

Surprisingly you can really put much straighter and eliminate all wrist movement...

What grip do you guys use ? Any comment on claw putting grip ?

oh ya... in case you are looking at the link on the 8 correct putting grips...
I saw the photo of the hand wearing a power band  or whatever band on his hand...don't believe in that thing...

see this youtube to know how it exactly turn out to be a scam 

https://www.youtube.com/watch?v=B9_6St8XDms

Mine is my left index finger over my right pinky finger.