After driving around for a few days with them on, mine aren't so bad. The electric adjust is fantastic feature to have. Backing my rv into the backyard, I have to work past gate posts, low planter walls and roof overhangs, with only five inches clearance on either side. This took numerous trips out of the cab to adjust the mirrors for all the obstacles. No more! If these were the price of the Powervision or Cipa's, it would be a different story, but for $200, they aren't bad. One thing that might be happening is that I had the factory tows on for ten years, got used to them and wasn't even paying attention to how much they vibrate. When I put the Kool-Vue's on, I may be looking for trouble, so to speak, because of the posts I have read regarding this issue. They are so easy to put on, I might just bolt one of the stockers back on for a day to see if there is that much difference between the two.
Sam