This is the one. It's held up a Galaxy J7, HTC 610 (forgot that one earlier) & now a Moto G5S Plus. Fully extended, the arm is about 7-8 inches long & the mount rotates freely 360 degrees. After a couple months, the base of the arm might get a little bit of a wobble. But usually lifting up the suction cup mechanism (you can keep it on the glass doing this) & re-seating it will tighten up the connection.
As it sits right there on my PC, it gets more 'flex' & wobble from the acrylic window of my case than it does from the arm flexing.
We it's in my vehicle, I like to mount it along the left support column of my windshield, seating it low, so the bottom of the phone is floating about an inch above the dashboard. This puts it where I can still see it for GPS, but it's not blocking anything from the middle of the window.
Sorry I don't know what brand it is. It was actually the first unit I grabbed at the store & it's worked great since.