We've been to Mama Melrose three times, twice with kids. We have never had problems with the service as far as I remember.
I think the quality of the cooking has decreased over the years. Our first trip was the best. 2006 and 2009 weren't as good. Our favorite dish is no longer served (actually they serve it at Cali Grill now). DW had the pipette pasta this past trip and was very unhappy with how bland it was. I forgot what I had, but I think I remember liking it OK. Dessert was good, though, now that we have learned to avoid the tirimisu (was better in 2002 and then they changed how the made it).
If it wasn't for the fact that we wanted a Fantasmic dinner package, we would probably not eat here. I doubt we will be back in our next few trips.