Pros:
It's brilliant when it's on in the right place. I have fairly large hands and long fingers, and making the bow 'thicker' under the hand is good. The bow is easier to balance and the comfort is great, and it helps with keeping the bow at right angles to the strings. I got one because the leather cover on the original binding was fraying and digging into my thumb causing discomfort, and with Covid I was unable to take the bow to a shop for a refurb. Gauging the right amount of space for my thumb between the grip and the frog was tricky and I found I needed to trim a bit off the bow master to improve the comfort. Now that I'm used to it, it's absolutely great and my older man's bowing arm can keep playing for a lot longer without inducing the upper arm ache which came from the discomfort of the old bow grip leather and the wrong way I'd come to hold the bow. Well worth getting and has given my playing a new lease of life. I've started practising again! I've been playing for 55 years and will keep the bow as it now is, rather than getting the binding re-done. Would have given 5 if I'd taken less time to get it on on the right place to begin with, but definitely worth getting.
Cons:
Difficult to get into the right place on the bow as I didn't want to remove more of the original binding than absolutely necessary - needed a bit of trimming to make room for my thumb.
