I've eaten at 50's on every single one of my trips...that would be close to 30 at this point. I have yet to be disappointed there. I have eaten at Mama Melroses twice...the first time was with friends and I liked it, so booked it for my dd and I a year ago. It was awful. I had exactly the same thing I had had the first time..and it was almost inedible!!! My dd had chicken parm, which she always has at 'Italian' restaurants. She said it was 'yucky'. It took forever to get soda's refilled and then another huge wait to get our bill. And, it was nearly empty at that time, so busy wasn't the issue.
We won't be returning to MM anytime soon.