I've had Oxford heated grips on my KLR for a few years now, I love them! I have the older style controller though, it still has the percent's but doesn't shut the grips off when you shut the bike off like the newer ones do (I think that's why they don't recommend a relay).
My controller crapped out this spring. The grips wouldn't totally shut off and would potentially kill the battery. I was going to install a relay to solve the problem but when I contacted Oxford they offered to send me out a new harness with controller... Even though I was long past the warranty period! Now that's what I call awesome customer service!
