I have the smallrig L bracket for the R5. It fits well and seems well made - and much more reasonably priced ($30 + $10 shipping). The screen can be opened and rotated - however, if the screen is extended (away from the R5 body), it cannot be tilted.Mine was delivered yesterday, it is very well made, on par with my other smallrig brackets. It is sitting next to the BG-R10, spare batteries, CFe card and CFe reader, awaiting delivery of an R5. So I can't say how it fits on the camera.
I ordered it directly from smallrig.com to get it laser engraved, the estimated '5 weeks' for lead time was 6 days and it took a week to go from China to my desk.