I've been running this mount for a few months. I'm not sure if it is the best on the market, but for the price it cannot be beat. It's a plastic construction. It works well for video and navigation. It has a bit of a jiggle that can make reading small cross street names hard with just a quick glance. It has a sticky suction cup, so your not going to be able to remove it for just occasional use. There is one guy who posted a "customer image" on the amazon page that shows it left a bit of a ring on whatever type of car he had. When I was running the very large Otterbox defender case it worked with no problem as shown in the picture/video above.
I just got the iottie and screwed in to the dash. I hate things taking up my ridiculous small windshield view. The iottie will fit an otterbox. It jiggles a bit but I'm happy thus far. I'm thinking about maybe Fiberglas resining it in.