My 07 EB with 20's had the band-type. They are a royal pain in the butt. When I replaced the "chrome-clad" plastic POS rims with real rims, the bands were just barely too small to fit around the new rim's center. So the place used really thick plastic bands that look kind of like zip ties on steroids. Well, I've had lots of problems ever since. One came loose causing the sensor to fly around inside the tire causing balancing issues. Now one of my sensors is bad causing the warning light to be on for the past 20k miles or so. I'm sure it's that same one that bounced around. The dealer won't touch the rims or sensors since they are no longer factory and I haven't bothered to go elsewhere yet to get the bad sensor replaced. Money's tight.
