Love it! Easy to engage, took 3 minutes to install, lets you "tweak" it as you go. Looks great!
It is a throttle lock though, so good for flats and steady wind. I use mine when I need to stretch my wrist a little.
IT DOES WORK with HEATED GRIPS, but NOTE that when you disengage it and don't leave enough room, after turning on the grips, the expantion may make it bind a little.
Solution: when you don't use the throttle lock, "unscrew" it a half turn more than you would do with regular grips.
Just a quick word of caution on this. If your throttle control device keeps the throttle from completely closing ( all the way to zero ) when you start the bike and it goes through its calibrations it going to whack your tps. I think the same with the idle screw fix for the idle problem.