Task: Sentiment_Analysis
user: 

 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.  /nFor the BDI reasoning process, (1) Based on the User Review, starting with "customer believes", list the user's beliefs; then, based on the User Review and the definition of Reiss's 16 basic desires theory, list the user's desires; next, based on the listed beliefs, desires and User Review, starting with "customer intends", list the intentions; (2) Finally, based on the generated beliefs, desires and intentions, construct logically BDI reasoning process, and select the correct answer based on the BDI reasoning process and input. /nThe definition of Reiss's 16 Basic Desires Theory: 1. Acceptance - the need to be appreciated 2. Curiosity, the need to gain knowledge 3. Eating, the need for food 4. Family, the need to take care of one’s offspring 5. Honor, the need to be faithful to the customary values of an individual’s ethnic group, family or clan 6. Idealism, the need for social justice 7. Independence, the need to be distinct and self-reliant 8. Order, the need for prepared, established, and conventional environments 9. Physical activity, the need for work out of the body 10. Power, the need for control of will 11. Romance, the need for mating or sex 12. Saving, the need to accumulate something 13. Social contact, the need for relationship with others 14. Social status, the need for social significance 15. Tranquility, the need to be secure and protected 16. Vengeance, the need to strike back against another person/nNow the user gives an instruction that describes a task and ask you write a response that appropriately completes the request. After thinking, when you finally reach a conclusion, clearly state the BDI thinking process within <think> </think> firstly and then the answer (i.e., answer only letters in options) within <answer> </answer> tags.
Instruction: Carefully assess the user's review for any strong expressions of sentiment, either positive or negative. Based on your analysis, select the most fitting sentiment option from the provided list as output.

Input:
User Review: For my first MP3 player, I found this to be a very good unit. It is light, easy to use and plays forever on a a single "AA" alkaline battery. But I use the Energizer Lithium Photo batteries and I have maxed nearly 15 hours of use on a single battery. Since I use mine on hunting or fishing trips, it gets plenty of weather and outdoor use.
The up side:
It's not tiny, but it is small enough. And it's weight is just shy of not noticable. It's simplicity is unmatched. There are no moving parts. So dust and things are not a factor. However, be careful about moister in any form. You can add 128MB Smartmedia card to it to upgrade from 32 to 156. I know the math doesnt work, but for some reason you will only get about 124mb out of your smartmedia card. I chalk it up to the space required for the format. I dunno. None the less the 128MB upgrade makes it a really sweet unit.
Down side:
You lose a little of your storage on the Smartmedia card. Another problem is if you download your music to the memory that is built in, and let's say you have a little space left, you cant use that space after upgrading the memory. So if you use 30 of the 32mb of onboard memory, then you lose the 2mb of space or you put a small lower quality song there. It will not let you borrow space from the card. And when you factor in your preset loss on the smartmedia card, you are losing a small chunk of memory,about 5-6 mb.
Overall I give mine 5 stars. You might consider the newer player, which has 64MB onboard and is only more. Not too oftent you will add 32MB of memory  inthe MP3 world. You can also add a 128MB smartmedia card to increase it to an aprx. 192MB. Hoever, you will probably only have about 185MB that will be useable.
Possible improvements: Allow the two memories to mesh together, as one. Build a unit with am/fm radio, and possibly add a record feature. Also, I would like to see a unit that would use two 128MB smartmedia cards at the same time. Like a unit that has 128MB onboard, and you can add 2 128MB cards to at the same time to crank out 384MB.

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


<think>
Answer: A: very positive