I'm not sure what audience WotC are trying to target with their PDFs. Sure, the quality is excellent. But the pricing is awful! $34.95 for a PDF? That's what the hardback costs in the US! - I did a quick conversion into Sterling and that works out at a little over Â£19. I can buy the genuine hardback of this for Â£21 from my FLGS. I can buy it from Amazon.com for $22!!! I suppose they can go back to their marketing department in a few months, highlight the really poor sales and say "See, told you PDFs wouldn't work".
Good book? Yes.
Good Price? No. And that's a really big no. In fact, if you'll indulge me, it's a 5-storey "no" with 24-hour room service, a five-star restaurant and a concierge who really knows his job. (With apologies to Blackadder).
But that's just my $0.02
[1 of 5 Stars!]