We did the Commissary. It was okay, but nothing great. I had the fish and chips, it was okay. My two boys had the Asian noodle bowls. They ate it, but I tried it and did not like it at all. The best thing was the Hagaan Daz ice cream bar.
We ate at the Flatbread grill last trip. The greek salad was really good and the wrap was ok (but you only get a half!! Rip off). We also got a steak gyro (not on the menu anymore....and I can tell you why). It had some sort of tomatoe dressing that looked and smelled exactly like vomit. Plus it was so salty, neither my husband nor I could gag it down. And to add insult to injury...it came with NOTHING on the side. No chips, no carrots...nothing and it was an $8 sandwich. I doubt we will go back but if we do we'll just order the greek salad.
my husband has decided to avoid CS at both AK and MGM...which I'll admit may be impossible. Have you thought about eating at your hotel?
Another Big NO on ABC Commisary. Not only was the food almost inedible, we had to wait forever to even place our order. I agree with the other poster, I haven't found a great CS at MGM, but Prime Time was delicious. If you haven't considered a table service here, you might want to.