Saints Row The Third - Is it worth the buy?

[xDonnaa]

Hey guys!

I'm getting a few video games for Christmas, most of which are sequels to games I've previously played; Elder Scrolls: Skyrim, Arkham City, Assassin's Creed Revelations. But I'm contemplating on getting Saints Row The Third but I'm not convinced on it yet.
I've never played any of the previous Saints Row but the craziness of the third game looks pretty intense and is right up my alley.
I downloaded the "demo" for Xbox and discovered pretty quickly that it was actually just a service to be able to make your character before the release of the game. Pity!
I understand it's a free roam RPG but I was wondering is it like GTA? It gives off that kind of vibe to me..
And I was also wondering is it worth the buy? (:

Thanks! :*