I didn't think I'd like this place as much as I do. I wasn't sure what to make of it when we approached it at Treasure Island, but it is Marvel, so I had to do it.
It's more of an interactive experience with props from the Marvel Cinematic Universe with a really great way to guide you though the whole facility. The staff are in character when you arrive and really do want you to have a great time. The exhibits are really cool if you love the films, especially when you are chosen as "worthy" by Mojolnir (sp?).
You end up graduating as a full fledged agent and can buy your badge out the door.
When taking your graduation photo though, I'd recommend to skip using the Hulk hands as your prop as it wont show up with the green screen and you'll just look like a handless fool in the process (exactly what I did).
If you are lucky, you can snag a 20% off coupon from the casino (if they are handing them out) down at Treasure Island.
Also, the store is pretty cool and I wanted everything from it when we were there.....I got a Hulk key chain.