The thing for people to see here is the ones talking negatively, bashing or plain saying they don't/can't work are the ones that have not/won't try them. Everyone that has tried them has nothing but good to say. They've been around for years and years if they didn't work they wouldn't still be here. They are used world wide and are used by multi million mile over the road semis etc. They work, some people are always going to be skeptic and stuck in old ways. They are cheap, work 100% of the time, rebalance everytime you start moving, end user installable, reusable, no downside. I have them in every tire I own and have had for years.