Being a Disney World nut, I might be considered somewhat biased here. But, on the other hand, I might be considered as somewhat of an expert. Let's go with expert.
MGM Studios is one of the four theme parks within the Disney World property in Orlando, Florida. It is themed to reflect the Golden Age of Hollywood. From the decor, to the characters, to the stores and restaurants. Of course Disney does a fantastic job of carrying out it's themes so there's no surprise there.
Some of the headline attractions include the Rock 'N Roller Coaster, Hollywood Tower of Terror, Star Tours, and the nighttime light show, Fantasmic. There really is so much to see and do here, it's worth at least a couple of days in you itinerary.
Personally, I enjoy the architecture of this park. I have spent hours just meandering through the park, distracted by the lure of an occasional thrill ride, soaking in the beauty and marveling at how Disney managed to create the things they have. From the 1950's style diner to the art deco buildings, it really is something to see. Again and again!