I've had CIPA slip on mirrors and the rubber strap mirrors. I feel confident saying that the vibration people report is simply amplification of their OEM mirror's vibration. Also if the add-on mirror is slightly convex, the vibration is minimized. The CIPA slide mirrors on my old F150 were unusable due to vibration, until I covered the mirror with an inexpensive convex mirror from the local parts store. On the other hand, the rubber strap clip on mirrors I use on my new Ram, are rock solid, with no vibration what so ever.