I had them on my last bike and again on my current ride. 43,000 miles total. I really like them. Very comfortable.
I have noticed that if I have any dirt of any kind on my hands when I get on the bike, it takes a bit to get the grips clean after that. It usualy isn't a problem, because I usually am coming out of the house with clean hands when I get on the bike. If I am in my garage working on anything, I wash my hands before getting on the bike now.
The ISO grips are a little chubbier than other grips I like the aileron grips for a slimmer grip. these two are my favorites. right now I have the ISO grips on my bike with the throttle boss...very nice.
Had them on my Road King and it was the first thing I added to my Ultra when I got it home. Yeah your hands get some black on them, more when new and less as they age but I wouldn't have a bike without them. I took the throttle boss off for the Ultra since it has cruise.
i had them, and then the rubber stuff started leaving black stuff on my hands from sweat. other than that they were comfortable.
Mine are comfortable but they do leave my hands black in hot weather. It may be a bad batch of rubber because I know other guys with them with no problem.