Having never really played a pen & paper RPG, I bought the 3 core books for 4E a while back, only to be scared away by the mass of information thrown at me.
Then I ordered this, the books are easy to read and well laid out. Making it easy to learn the basic game mechanics.
The ready written adventures guide you through to level 3, helping you understand the level-up process. And it comes with several pre-built characters, saving new players from possibly the most complicated, though, one of the more fun parts of D&D, designing your own.
It comes with 3 pop-out dungeon tile sheets for the adventures in the book, though there's nothing stopping you from writing your own adventure and re-using these supplied tiles.
The monster and character tokens are also worth keeping, as they offer graphical assistance while playing the game. Though ultimately miniatures are probably better.
The only thing I wasn't happy with, was how delicate the box was. I made some supports and now it holding up well. But it arrived a little crushed.