After years of illegally using a windshield mount, I finally plopped down $28 for a Garmin friction mount. My nuvi and I now
walk ride the straight and narrow.
While suction mounts are only illegal in California and Minnesota, there are other reasons to choose a friction, AKA beanbag or dashboard mount -- one being theft deterrence. No suction cup, no tell-tale marks on the windshield.
This dashboard mount has a weighted, grabby bottom surface to keep it in place. I have not been able to get it to even budge in jackrabbit starts or slamming on the brakes. It comes apart easily for stowing in the glove compartment and is fully adjustable. I like it so much that it is now the primary mount that I use.
I can't see people not being happy with this setup. But don't take my word for it; as of this posting, there are 433 reviews of it on Amazon, with an average five-star rating!