Yes I had a set of the more advanced grips on my CBF before but the grips had actually worn through to be able to see the heating elements on the clutch side. I can imagine they were several years old just by the look of them, I only ever used the first couple of settings, there were 5 in all, that's why I was happy to downgrade to the cheaper ones. Also the old grips had a facility to switch themselves off if the voltage went below 12.8v I think, never used that as I had them wired to the ignition. They had the same crappy connectors as the commuters though, also the Sports Bike ones I fitted for Grace also had the same crap connectors. I expect there more expensive ones have the better connectors like you say but if I was going to spend that sort of money I would get the Ultimate Add Ons grips like I have on the Hornet. I put some Chinky Chonky heated grips on Shadows bike last year and they have been just fine and only cost about £15. I still have another set sitting on the shelf but just couldn't bring myself to fit them to my bikes but I bet they would be fine. .