Suction cup is all ive seen.
the A2 is pretty good. I had a few problems out of the gate. Seems to be good for the last few months. The GPS is pretty good. Ive never used any of the Garmin stuff so cant compare it. Lots of new roads around me that are not in the maps yet, and you have to really watch where the thing will send you. Some times the Tom Tom way is the long long way.
But its loud and clear with lots of good features. Its way better than having two little boxes on your dash. Add the back up camera and a sat-radio and you would have no dash left.
Yes to me its worth the extra $... ... . Lots more guage options.