Review on AHK Headrest Universal Smartphones Compatible by Douglas First

I'm an Uber driver and using this with a Revain Fire 7 tablet for back seat passengers. The material makes a very hard-wearing impression and hardly wobbles. Does the job so far. The only thing to note is that the spring holding it to the seat headrest isn't very strong, some might have trouble with that. Although it works for me. UPDATE: It doesn't look like it was actually designed for Kindle Fire, the brackets press the power button or volume buttons and cause the device to reboot :( And it's not short enough to reach the long sides of the tablet fit. I'm looking for something better now.