The Window Suction holder that came with my Garmin worked fine but I hated the ring that it left on my glass whenever I removed it. Evenutally it stopped working, no longer held to the window if I hit a bump. I went to the store to actually just buy a replacement however they were out of them so I bought the dashboard friction mount. LOVE IT!!!!! There's nothing to leave a mark on the interior of my car. It works PERFECTLY...no matter how big the bump, how fast the turn, it never moves. Had I know this was so wonderful I would have bought it from the get-go.