These mounts are of quality make for the price and have stayed in place without me having to adjust them (I installed them upside down from the ceiling with the Arlo 2 mounted on a 45 degree angle. Most other budget mounts I have seen have an issue of not holding the camera in-place and giving way to the weight, with buyers complaining about having to re-adjust them every couple of days.
I also have one of the Netgear mounts that came with the Arlo pro 2 which I have had to re-adjust it after a week of being installed, however all 4 of these KIWI mounts that I bought have stayed put for the month that I have had them in place without need for re-adjustment. This is due to the way the ball bearing is held by the pressure of screwing the shell to the base of the mount, it's a great design. I highly recommend these.
*EDIT - 10 Months later, and these are still great, meanwhile the Netgear mount that came with the Arlo Pro 2 has started to rust and needs to be re-adjusted every couple of weeks. Still highly recommend these and thinking about buying some to replate the Netgear (wish they sold them individually instead of in pairs).