Here’s a couple of posts of mine from this thread with my thoughts on it.
In summary; very pleased with it for the price, but there are a few compromises.
I have the Nook HD+ (9″ version) and love it, although I removed the default Nook flavoured OS and stuck CyanogenMod on it.
There’s no camera or GPS, but I can live without them for the price (£129 when I bought it). The processor isn’t cutting edge, but is nippy enough for most things and the screen is very high res.
Nook are currently selling off all their accessories for £5 each, I just got a fancy case for it that should have been £35!
My only niggle is that it uses a proprietary charging cable, so if it breaks I’m stuffed (although reduced to £5 for a spare at the mo).
Running CyanogenMod is noticeably quicker, but it’s not 100% quicker or anything that dramatic. The best benefits are that you have the flexibility of the full Android OS and that the Play store becomes unrestricted – my MiL bought one on my recommendation but she’s kept the Nook OS and there’re various apps that won’t install on hers that are fine on mine.
It’s not all plain sailing though; while CM seems very stable I do get annoying, occasional, flickers on the screen (a couple of times every 1-5mins) BUT that only happens when I use it while it’s charging. I’m happy to live with that for the speed boost and functionality increase.
EDIT: I followed this guide;
http://forum.xda-developers.com/showthread.php?t=2317500