People say that they work well but some mild blockage of front camera view.
I just took my R1T to service center and they mounted the plate bracket onto bumper for free.
It slightly blocks the bottom view of camera but hardly noticeable.
It looks like similar functionality to snapplate, which has been discussed a bunch. But I haven't seen any discussion on this website about that particular mount.
I think I like to look of this one a bit better than snapplate. I wish they would share a picture of the camera view with it installed.
Good find. I might order myself one, but interested in how the camera view will be. I still have a Snapplate Gen1, but it being 3D printed makes me question its long term durability.