Well, com what I've gathered here since I started this thread is: the OEM grips may be the warmest, and the neatest (most compatible) install. But... You have paid a premium for that, although they may (should) come with a full one year warranty. I dipise the overly large, in your your face control, BUT... Like the idea of an infinitely variable, device that actually controls the draw on the generator. I think that's important. Having the heat coils embedded in the grips, potentially generating the most heat, seems the most significant reason to get them (price being no object). I only wish they came with a more discreet adjustment dial!