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:
I was koss the plug long-time fan - during the last 10 years i've used more than a dozen of these. Now i have a strong feeling that it's time to find another product of choice for me - build quality and sound degraded greatly over the course of years through the brand.
Build quality: horrible. Average life-expectancy for them with heavy use ( as portable mp3 player headphones being carried in jeans pocket everyday) is about 2-4 months, as the wire around jack eventually loses connectivity. Sometimes it'll happen soon, sometimes a bit later, but so far no koss plug lived more than half of a year with this type of usage.
Sounding : average. there was a time when the sound of the plug was unmatched for the money, then something seem to change. Now they sound very mediocre.
Noise isolation: superior. I've been using koss the plug all the time during trips in moscow metro (the loudest and noisest in the world).
Easy of use: vary for different people. A lot of my friends find these headphones uncomfortable for their ears, but for me plugs fit like i was born like that.

verdict: 3 stars.

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