No problems yet, but only used it a couple of times in a 152 so far (it was a Christmas present and weather hasn't been kind to me so far!). The PA28 I usually fly is offline at the moment. I'll let you know. These things can depend on canopy construction &c.
One thing I did do is buy a RAM mount - the included one is OK but a bit flimsy, and I found it vibrated. As I already had most of the RAM hardware from my old (Lowrance) GPS it was cheap to buy the Aera mounting block. It's much better like that.
Tim