Nuvi 360 on sandbag base
I have the Nuvi 360 with a sandbag friction base from Garmin, I really like it, I did a 500 mile trip on Texas Hill country road with 0 slippage. really good! and it's a bit bulky,but I kept it with the charger in my glove box when not used it has 2 great points
1, it doesn't put undue stress on the vents and blocking AC and
2, it doesn't leave an unsightly ring on the windshield on the suction cup mount which I hated.