I have over 50 hours using during the last two years, it hasn't fallen
off... yet.
The suction cup is 4-5 inches in diameter. I usually attach it to the
lower corner of the windscreen.

Mike 'Flyin'8' wrote:
No problem with the suction cup falling off if you have a hard landing
or some speed bumps in the air? I was considering that option as
well.