I'm concerned with ejection issues (reported on earlier versions of this rail) and the cumbersome access for cleaning and maintenance
Certainly not an issue with mine. I have had probably about a thousand rounds through without a single feeding issue.
Cleaning is stupid simple, pull out rear retaining pin, swing rail up out of way, proceed to clean as normal. I find return to zero is absolutely fine. Maybe others can chime in with their own results with these rails but I highly recommend them.