I bought one after reading other's positive reviews. I am now part of the club! Makes accurate lathe drilling easy and quick. I used to rough turn blanks to round, to fit the collet chuck. No more. Much quicker.
I have one. It's the ONLY method I have to drill. Works well. One word of advise though, keep the jaws clean. Any chips from drilling or whatever WILL cause problems. And, if the sides of the blank are not parallel ... check for 'wobble' before drilling.