I enjoyed the first Dead Island (bought GotY edition) and I wasn't disappointed with this.
Graphics are nice, gameplay is original, but a little bit repetitive.
Story is average, quests are repetitive and you'll find yourself in the same place many times.
Same buildings, same textures, same models, same everything.
I don't feel giving a bad score to this game, it's one of the few I played from begin to end.
But it feels like something here is missing. You'll have to play with this feeling till the very end.
Good game overall. It is a 10+ hours playthrough. But nothing special.