During the game one of Duke's chicks asks him about a computer game that Duke was playing on a big TV: "Was it any good?" Duke answered: "Yeah, but after 12 freaking years, it should be...". After finishing the game I do believe that that game is good. Not perfect, but really good.
It has many different mini-games and adventures in it - driving a small car, slot games, air hockey, basketball, pinball and even billiards. It also has a few puzzles and some mild erotic content. Being reduced to an action figure size and navigating through human size areas is a nice challenge. But what I value the most is the good sense of humor and typical Duke's comments during the game. Some of them are really funny.
I don't understand why some people are giving low rating for the game. It's not supposed to be anything like "Half Life", "Rage" or "Dead Space". It's a Duke Nukem game and I think that the developers kept to the unique Duke's style really well.
So I do recommend this game if the price is right. I paid 5 euros for it on Steam and it was worth every freaking penny.