My biggest problem with these tires is that over bumpy terrain they are really really bad. When I say bumpy terrain I don't mean rocks and boulders I mean ordinary roads that are not very smooth. On certain highways the car really shudders over the older sections. I think most of the issue is caused by the technology used to make these tires run when flat. The sidewalls are so stiff that every road imperfection is transferred to the cabin and between bumps the tire does not have a chance to settle down so a series of bumps leads to chaos from the tires. On long drives I find the tires to be ... tiresome. The near constant feedback into the cabin from every minor road imperfection adds up on long drives. These are the only run-flat tires I have ever driven so maybe they are all this bad or these are worse than others. This problem is even worse when off road. The tires don't really yield to the contours of rocks and you cant deflate them slightly for use on sand. They are useless in those places. When the road is smooth then they are good tires. Better grip than expected on dry roads, and thanks to the stiff sidewalls they offer excellent cornering stability. They provide sufficient confidence on wet roads. I have not driven them in snow.