I've lived pretty close to the Mamma's in South Pasadena for a few years now, and it's my favorite (non-homemade) pizza joint around. For a long time I'd heard that Mamma's would be opening another outlet in East Pasadena, in a location that used to be a Burger King. After months (many months - I'd first heard rumor that September was their projected opening date) of driving by and seeing that they were almost open, a friend of mine informed me that she had recently tried it. True, she wasn't pleased with the temperature of the pizza, but she'd had it delivered, which is something I stopped doing long ago unless I have no other choice.
The other day I was over at my parents' house and wanted to introduce them to Mamma's. I ordered a pizza, was told it would be ready in 20 minutes, and drove down to pick it up.
As I mentioned, this wasn't quite as good as the South Pasadena location, but that one has been open (and busy) for many years. There is no reason to think that in time this location won't improve and be just as good as the original. It's a welcome addition to a part of town where the pizza options are Pizza Hut and Chuck E. Cheese