Hey Dab,
never had any problems with them, installed them October last year, so more than an year now.
Although since last month, the Intelligent Heat Controller behaves funny, even if the bike is on and running, it starts bleeping and shuts the grips off. ( this option is in case you forget to turn the grips off when you get off the bike, so they don't drain your battery ) I believe the reason for this is that the battery is about to die and the controller is set to turn the grips off when the battery goes under 90% of it's charge, or something like that. Anyhow, I just turned the setting off and they are working fine.
Hope this helps
- Regards, Kris.