I've heard that it's pretty good, though it's one I haven't been able to obtain (it came out near the very end of the line, by which point the books weren't being widely distributed in Canada). I hope to read it sometime if I can track down a copy, or if it's reprinted (a possibility since Virgin Books and BBC Books are now not only owned by the same company, Random House, but are even part of the same division, Eubery).
The thing about the NA books is from the very beginning the idea was to create Doctor Who for adults. The very first book, Timewyrm: Genesys had sexual content that made a lot of people uncomfortable. And Ace became a regular Jim Kirk during her time in the books. They were also progressive in introducing gay companions (take a bow RTD, but it wasn't just him). And the very last book - the only one featuring the Eighth Doctor - remains controversial as to whether or not he and Bernice Summerfield get it on. The only people who think Torchwood was the groundbreaker in "adult Doctor Who" are those who've never read the New Adventures novels.
Frankly, though, I find the more controversial aspects of the books to be the rewriting of the Doctor's history, as the books followed the so-called Cartmel masterplan. And while I've yet to obtain a copy of Lungbarrow, one of the last books (I saw a battered copy for sale in a shop a few months ago for $75!), apparently it just goes wild in ways that makes "Ferengi on Star Trek: Enterprise" look like a hiccup.
At the same time, the NAs gave us Human Nature, which was adapted by its writer, Paul Cornell for TV. And Bernice Summerfield, thanks to being revived later by Big Finish, is the longest-running spin-off character in the franchise's history. And many of the writers of the TV series entered the world of Doctor Who through the New Adventures. Including that RTD guy. So the NAs form a valuable part of the franchise's history, one I respect greatly.
Alex