I haven't noticed any vibrations. The Vortex moves a lot more air than the fan it replaced. Noise level on high speed is about the same as the old fan. I just run mine on low speed continuously in the 95 degree weather and it keeps the bathroom cooled down and can hardly hear it run. When you replace the old fan, don't cut your old wires short, leave them long. Notch one side of the fan unit so you can run your wires behind the frame out of sight. Granted it isn't a Fantastic Fan but it didn't cost $200 either plus you do the complete mod in the inside, no getting on the roof.
2014 Palomino Puma 25RS
2011 F-150 Super Crew XLT
Days camped in 2014 - 23
Camped 2015 - 47
Camped 2016 - 51 done - 6 more planned so far