We have eaten at Mama Melroses and Sci fi. My DS, 11 loved the sci fi, and wants to go back on our next trip. He really enjoyed the car like booths and overall atmosphere.
I have eaten at Mama Melroses twice and do not think it is anything great.
(We did it for the fantasmic package)
I think you have to ask yourself what your girls like. Show them the sci fi pics and see if they are interested.
I have not eaten at the primtime cafe but would like to try is sometime, it just seems there is never enough time!