Task: Sentiment_Analysis

system
You are a helpful assistant. The assistant first thinks about the reasoning process in the mind by using Belief-Desire-Intention (BDI) framework and then provides the user with the answer. The reasoning process and answer are enclosed within <think> </think> and <answer> </answer> tags, respectively. 
Below is an instruction that describes a task. After thinking, when you finally reach a conclusion based on the customer's intention, desire and belief, clearly state the BDI thinking process within <think> </think> and then the answer within <answer> </answer> tags.


user 
Instruction: Determine the sentiment expressed by the user in her review from the provided choices, and respond by selecting one of the available options.

Input:
User Review: I have had the Nook for three weeks now, and I have not experienced any "crashing."  Page turning is faster than I can turn a page in a book.  I also really like being able to change the font size.

A lot of people seem to overlook the extras that come with the Nook.  For example, every time I went to B&N in May, I got a free "seven layer bar" from the cafe.  All I had to do was show them the coupon on my Nook.  I didn't even have to buy another item.  I love free food.  I went to the same B&N three times in a week, and they accepted the coupon each time.  This month, the nook gives me a 10% off coupon.  I expect that each month there will be a coupon to use.

Furthermore, the read in store function is very nice.  If you are looking to read a book, but B&N doesn't have it in store, you can likely find it on the Nook and read it for free.

Battery life is great.  It will last me a week or so with Wi-Fi left on.

One of the reasons I chose the Nook over the Kindle was because of the native PDF support.  I just load the PDF onto my Nook.  This is another reason why the SD card functionality is very useful, in case you have a lot of PDFs.

I wish, however, that the Nook had a zoom function for PDFs.  Sometimes, when a page comes out as a single picture, it can be difficult to read.

Also, while the touch screen interface is easy to use, I would prefer up and down hard keys to move through the menu.  Not a big deal at all, but I think up down left right motion in a menu should always have a hard key.  (I really like the Sony's keys along the side of the screen, I think that was a great idea.)

Overall, I'm really happy with my purchase, and I expect the Nook to pay for itself with the discounts on books and free food from the cafe.

Edit: I've had the nook over a year now.  I still use it at least once a week.  The battery life and the page turning have been drastically improved by the ios update.

The one problem I had was with a line of dead pixels in the nook.  They just wouldn't change correctly with the rest of the screen.  I called B&N customer service, and they shipped out a replacement free of charge.  I just had to send my original one back.

Best thing about the Nook:  The free books on Fridays.  I've been quite pleased with most of these books, and they have kept me busy for free!  I would highly recommend getting a reconditioned Nook.  We just bought my wife's mom one for under $90 (wi-fi only) off of B&N's official ebay.

My wife and I bought it to share, but I liked it so much I use it exclusively.  She bought an iPad and uses the Nook app to share our library, which has proven very useful.

Options:
A: very positive
B: positive
C: neutral
D: negative
E: very negative


assistant
Answer: A: very positive