Still working my way through and I have to say I agree with Crothian's assessment. I do like the race level idea however, even though the individual races are not the most amazing things in the world.
I'm not a Monte fanboy.. but I think some of the ideas have good potential.
I am reserving judgment a bit until we play the rules with our group.. which I hope to do using Siege on Ebonring Keep in the near future..
However I really like the modified spell system and many of the spells in the main book.
I'm looking forward to Diamond Throne for some extras to throw around a bit. I am considering adapting all my ECL races on Brekton to be race levels. Which is something Savage Species got me thinking about to some extent and AU just reenforced.