eh... if I could return it, I would.
It's the first 4E book I've purchased in a long time, and I'm unsure if I made the right choice by picking it up.
The alternate racial abilities are somewhat cool, but they present some interesting thoughts such as 'can I have the sun elf alternate features and take the moon elf feats which were previously presented in earlier material?' Still, I do like the idea of alternative racial features.
Though, another downside I see is that we'll potentially see that design concept spammed in a similar manner to alternate class features. Eventually there's a way for every class and and every race to mimic any role, and we wind up the same place where I started to get fed up with 3rd Edition. There was a point where it seemed as though classes and races in 3rd Edition had lost a lot of their feel to the overwhelming multitude of mechanical options and back roads. Then what? I have both the issues with 4th Edition I don't care for *and* the old 3rd Edition issues I wanted to get away from.
Bladesinger... well, I'm not sure. Depending on your build, it seems like it could either be total crap or full of cheese.
I think a lot of the fluff is very good. However, there are a lot of things in the book which make me feel I'm no longer part of the target audience for D&D.
On a side note: am I the only person who finds the Essentials format more difficult? I like the new monster layout in the newer monster books; that I like. However, the new way of presenting player options such as classes and feats leaves a lot to be desired. I had a much easier time finding the information I wanted in the early 4E books and understanding the information presented in the original 4E format.