I've used a nook for a few years (the original and then the simple touch) because I have over 100 books purchased before there were e-readers, and I could load them on the nook. I recently researched tablets b/c I also want easy access to google docs and a particular website (for knitters). I went with the Nexus.
I like it a lot. I've had it for a couple of weeks - put it through its paces. I find Montano easier as an e-reader than the nook reader. It certainly is easier to make collections with Montano than on the nook.
I appreciate having an android tablet that isn't limited by b&n or amazon. I don't know if other vendors offer this option, but I purchased mine through Staples and had 14 days during which I could return it if I didn't like it.
I am not only keeping it, I'm de-authorizing my simple touch and giving it to a needy friend b/c you can, of course, side-load on it.