Whilst it's true that this may not be the most polished of books, it's certainly not true that this diminishes from the enjoyment of reading it - it's free for crying out loud!
I found The Phoenix Conspiracy to be original and endearing. It's probably not going to be winning any awards any time soon but it had everything I love - it was pulpy, sci-fi goodness.
I didn't find the characters to be 2-Dimensional (as some people have suggested), I loved the interactions between characters and there was some very human dialogue thrown in to counter-act the fairly bizarre and science-fiction plot.
Regarding the plot I found it extremely fast-paced and riveting. Even the political aspect of the story was well-handled (not common in books like this) and I found it all very interesting and readable.
A few subplots in the book really captivated me and there was some original and bold ideas weaved into to the story to mix things up (wait till you hear about the 'Trinity').
I thought that there was some 'noir' influence embedded in the story (possibly?), certain characters had personality traits that reminded me of old detective novels etc.
All-in-all I really enjoyed it and can't wait for the sequel, will most definitely be willing to pay a fair price, would love a physical copy to hold in my hands.