This is probably the strangest Mr. Hero i've ever been to, but i'm a recurring customer because the service has always been good. The store itself is like walking into a Mr. Hero in 1997, i'm pretty sure the menu board/graphics have never been updated.
However, it seems to be dependent on who's working as to how your experience will be. I typically end up there Fridays during lunch hour, and it's always two older Indian guys working. They are super fast and efficient, and can handle a rush with no issues.
Friends and family have gone there at various times, and at some points, the store is totally staffed by two or three teenagers. This seems to be when orders get messed up and the store isn't as clean as normal. My dad had a $6 item missing from his bag, and a friend did not get the correct size of sandwich and was overcharged. Check your bags and receipts!
Overall, I can't complain, but I see why others do.