I found the shubb when used on the 7th fret or higher gets in the way where as this g7 does not, or is that because I use it upside down? Also you can scratch the back of the guitar neck with nails when raising the lever.

My guitar - Brook Tamar -has a thinish neck and the shubb cannot be tightened any more.

With the G7th you apply the pressure you require.

The Kyser is a good exercise for grip strength so is well worth having one to retain muscular strength in the wrist and can be moved with one hand, the G7th requires both hands for it to be moved.