I got this to hold an external monitor that I use for video editing and it works pretty well. The clamp that holds the table/screen extends out quite a bit. It pulls out a certain amount and if you need more there is a button you push with the word "open" by it that lets it go even further. I'm not the biggest fan of the way the mount attaches to the base. There are 4 prongs that like up with 4 slots on the clamp and you push them to the side to lock into place. The problem with this is there didn't look like there was actually any room for the prongs to slide over so... The base does have a sticky suction cup and once you get it into place there is a section right above it that you twist to lock into place. As much as you can, try to make sure you get this exactly where you want it to go, because it is very hard to remove the suction cup part once installed. There is even a small tab that I think is there to help you pull the suction cup up, but it didnt work at all for me. I had to use a pry tool to get the suction cup/base up. The mount portion can extend out a couple of inches and the bracket has essentially a ball head that is adjustable, but I was unable to get it exactly how I wanted it. But again, I realize my situation isnt what this is intended for, so Im not dinging it on that. The mount also has a ? hole on the top, Im guessing so you can attach a phone mount and have them right be each other? There is also a vent mount option (accessory) included if youd rather mount it to a vent. Then there is a round plastic plate with a sticky circle in the middle. I'm guessing this is something for the base, but I cant figure it out and there are no instructions included. I cant tell you how well this will hold up to road bumps, but based on how hard this is to remove to reposition I dont think there will be any issues. Overall, this setup works for what I wanted to use if for.
