Definitely Worth It The First Time You Use It!
I've been setting up several guitars lately and this winder is excellent! I couldn't tell you how many of those cheap winders you get at the counter of your local shop I've gone through over the years. The cup on this thing is made pretty beefy, unlike the usual flimsy plastic on the cheapo crank winders. I just did a setup on a Strat and it worked flawlessly. Now I really have a use for that little Black & Decker power screwdriver. No more cranking with a winder like a mad monkey!
I also tested it on my bass and it worked just fine for that too. The Lester is next on the list. Do yourself a favor. If you work on guitars much, or at least go through strings quickly, this little gem will definitely find a home in the top drawer of you tool box. The only thing I will be dong to this winder is cutting a piece of rubber or cork to fit in it. This will keep the winder firmly on the tuning peg, but away from the edge of the headstock. Buy one NOW!!!