Instruction: Given the user's review, identify the user's sentiment from the listed options. Answer using one of the options.

Input:
I bought a Nook during one of my visits to Tampa, more specifically at the Wiregrass Shops. I must admit that I was tremendously excited when I got the device, because of the reviews and also the SD card capability.
My joy was short lived. During the 2 weeks that I owned the product I was never able once to open none of my sideloaded pdf's that I have amassed over the years (over 30GB - I am a voracious reader). A long string of calls to Customer Service and the shop itself ensued, after which I decided to take the trip again (I live outside of the USA) to return the device directly to the store.
Much to my surprise, they were extremely receptive at the store and also very apologetic for the device's inability to function properly outside the States and also the lack of functionality and propietary issues. I was refunded for all the items (Nook, cover case and screen protector) in no time at all.
So, in summary, the Nook gets a ZERO star in my review for paying more attention to the esthetics rather than the functionality of the reader, but B&N gets a FIVE star rating for their approachability and for their great costumer service!

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