Aaron Cowan reviews the 5" gun on his Patreon page. He ran the gun through his usual 2K test which includes the four drop tests. He doesn't have any self-ejecting mag issues and the gun was quite accurate in his testing. The only thing he found odd was the fact that he kept getting ejection failures when running the gun with one hand only. He assumes this could be cured by playing with the recoil spring. I'd say that's a good guess.
Overall he likes the gun and thinks it is a good "gateway drug" into 2011s. I would say the MAC is the better value. I don't know if Aaron has seen/shot a MAC yet.
He mentions he had a student bring a 4.25 gun to a class that ran fine. Yep. That was me....