I've been using them for years. The last few bags however are different, they changed something. They don't want to tighten up anymore, they go so far then they start slipping, kind of like the old Scotch ones that would slip after they were tight enough. Only this doesn't feel like it's slipping for that reason, the wire nut is a whole different design than the old Scotch ones. This feels more like a cheap wire nut, which I hate and the reason I was using the GBs in the first place. My supply house just shrugged their shoulders.
I will probably now try Ideal, we work hard in the field and the last thing I need is stuff making the job harder.