I have it.. had to go through hoops to get it since its not available on the Canadian market. It's not bad though. I tend to use it most when I'm stuck at the office between meetings or at lunch or something, but the screen is just way too small on my DZ to read them regularly. I tend to stick to my nook when work sends me off to places unknown for any length of time, because being stuck in a hotel room and not wanting to be outdoors and exploring the area in the dead of winter really sucks.
If you're on facebook, join the nook group that B&N has. Every Friday they have 1 or 2 free books they're giving away. It's hit or miss, but unfortunately most times its miss, unless you're into the trashy grocery store check-out novels.
There are a TON of books you can purchase though. I've found almost everything I was looking for (I read lots of historical fiction and history type books as well as fantasy).
They do need a wider selection of fantasy/sci-fi books though, although I haven't looked much into the sci-fi selection since its really not my thing. If they came out with star wars ones, and I knew what the proper order was to read them, I'd be all over them though.