I have had my eye on getting a ball vise for a while now but the pricier brands are not in my budget currently. I had been looking at these and wondering if it was going to be a case of 'buy cheap, buy twice'. Honestly I actually wish I had gotten one of these sooner because in my experience it is worth it.
I have used it for several settings now and it has vastly improved the ease and speed of the job. The vise itself feels reasonable quality and the jaws are sturdy, they have so far given me no problems. i have only used the ring clamp accessories so far and whilst these are not the best, despite feeling cheap, they do actually give a good hold on the work. I have spare leather to replace as this will probably be the first thing to wear.
I am expecting to have to do some adaptations for my working, but then what tools don't the trade adapt to their needs. There are a few YouTube videos addressing cheap ball vise modifications and I have found these to be useful for future ideas. Don't get me wrong, I love this thing, but it does lack in the quality of accessories, but if you look at it for the ball itself and have a creative approach to the accessories, it's doing the job and making my earning easier for now.
In my opinion, this has been worth spending on. I cant justify the price hikes on the grs, when this does the same job.
Paulo 
