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: Assess the user's sentiment in the provided review and select the appropriate sentiment option from the list as the answer.

Input:
User Review: As a professional home cleaner, I have been using these for years. Whenever one would wear out, I'd get another one because it's handy and does a decent job of cleaning places where I need more power than a wand.

This is a powered hand vacuum. Unlike the bagless battery-powere Dust Busters, it's got a traditional microfilter dust bag, is belt driven, and uses an impeller-type fan system like those found on full size upright vacuums. An interesting feature of this model is that the roller brush is driven by a belt that is run off the front of the impeller shaft. Unlike eaelier models, the Ultra Power has a two-position switch for hi-low speeds and an accessory hose that is run off the right side of the cleaning head. The older design had a port above the cleaning head where you attached the hose, which I felt was a little better design.

The cleaning path is about 6 inches. Not huge, but bigger than the turbine-powered wand attachments that a lot of uprignt vacuums are using now, and this is also a lot more powerful. It has a 4-amp motor, which gives it decent cleaning power for just about any job. I have used it on my car's upholstry, tight spaces where my uprignt vacuum won't go, on sofas, stairs, and seat cushions, but I mostly used it on sofas, stairs, and cushions because it works a lot better than than the wand attachments for the vacuum. There's also a switchable cover on the front of the cleaning head that flips up to expose the front of the brush roll for cleaning the fronts of stairs, which is a nice because otherwise I'd have to wrestle with the vacuum and turn it on its side to get to them. The cord is long enough to get up just about any staircase I have cleaned. The belt lasted a while and was easy to change (I should mention that they included a tool to help with it), and the bag is easy to take off as well, and I like the fact that it's sanitary and keeps the dust down. The older models used a static bag that you just emptied out, but these ones use a disposable bag. Plus it will go a long time before the bag needs changing.

Despite the improvements over an upright vacuum's wand attachments, the Dirt Devil needs some improvements. The first problem is the hose. It just doesn't work good. There is some suction, but not enough to do the job. The other issue is the size. This thing is big (it gets bigger when the bag is inflated) and a little heavy (at about 5 lbs.) due to that big motor up front. It's not overly cumbersome, but the weight makes it a little tiring after using it for 10 minutes. The noise isn't much of an issue, but when it's on the highest setting, it is pretty noisy, but not so obnoxious that my ears were hurting. The motor also generates a lot of heat when used for long periods. The size can also be an issue foe getting into small spaces where you want to do deep cleaning like foor mats or in a car's footwells or back seat. The dustbag gets big when inflated, and adds about 8 inches to the length. There is no fancy HEPA filtration either, so the bag will start to smell if you let it get really full. I liked how it cleaned the floor mats and seats, and for the spaces I could shoe horn it in, it did great, but for the small spaces, forget it. Use a wand.

Other than that I like it. It has been a faithful companion on cleaning jobs and has been pretty reliable. There have been some malfunctions, mostly in the belt drive, but belts are cheap, and it has a 3-year warranty as well, so if it breaks or fails, you can send it back in. Plus, it's $30, which is a good price. There are better choices out there though. For an extra $10, you can get Eureka's 71B, which is a fantastic unit, or even Royal's own Classic Dirt Devil which is pretty much legendary and has been used for decades. My recommendation is to check out the new Classic "Pet" model. It's more powerful, has HEPA filtration, bagless, is smaller, quieter, and cleans better. The cord is generous, but it could be another 5 feet longer.

Pros:

Good cleaning power
Filter bags last a while, are easy to change, and sanitary
Long power cord
Flip-up vertical stair cleaner

Cons:

A little heavy
Noisy on the high speed setting
Cumbersome, doesn't get in small spaces well
Accessory hose is useless

As much as I like it, it has been hard to live with at time, and find myself reaching for the Classic more often. You can use the "turbine" heads that stick on the wand of your upright, but they don't clean as good as a powered hand vac. My recommendation is to buy the Eureka or the bagless Pet model. They are more powerful, quieter, and just work better.

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


<think>
Answer: C: neutral