I purchased the ProMediaGear L bracket for my R5 due to my previous L bracket having too much vibration. The L brackets with the cut out to allow the screen to tilt tend to vibrate. The ProMediaGear bracket reduces the vibration significantly. The quality of the bracket is very good.
The bracket is a bit bulkier than the L brackets that fit alongside the camera. There are great advantages to the ProMediaGear design, easy access to the ports on the side of the camera and it allows the screen to rotate completely.
The one difficult area that I have is that my canon RF 70 to 200 lens will not fully rotate while using the L bracket. The knob on the lens collar interferes with full rotation of the lens and camera. If I extend the vertical side of the L bracket the collar will clear the L bracket. While this is a drawback, the benefits of the reduced vibration far outweigh the inconvenience of the lens collar interference. I also use it with my 100 to 500 lens and it works flawlessly due to the lens collar being set further towards, the front of the lens.
I guess with any item there are always pros and cons. I don’t know if anyone can manufacture something that will work in all situations.
I am not writing this as a criticism of the ProMediaGear L bracket for the R5. I am just pointing out one of the situations I ran into.
I would buy this again over L bracket with the cut out for the rear screen rotation. I think this is a very good product.