I still really like the Studio Movie Grill, but sat in the "General Admission" seats last night for the first time, and found that they were not nearly as comfortable as the "Reserved" seats with their own little tables. Unfortunately.
The GA seats are also quite tightly shoved together, so if it is a full house you are bumping up against your neighbor, and it is distracting.
Best bet: Go to a un-crowded movie and sit in one of the reserved seats that is not pre-reserved (not pre-sold, and doesn't have the little "reserved" sign on it) to enjoy the reserved seats at the GA price.