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

Input:
I've had these headphones for close to ten years and primarily use them when I travel.

Pros
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-GREAT Sound
-Lifetime Warranty
-Once you have them on your head and adjusted they stay there

Cons
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-No volume control
-They press so firmly on the side of my head it gets uncomfortable after a while, even using the pressure setting switch on light
-I've had them in twice for repair - lost sound on one side (for no apparent reason - I'm not hard on them and don't use them that often, only a few times a year)
-Every time I take them off they lose their adjustment settings
-They really need to come with a better case.  Mine came with a drawstring pouch that was difficult to insert the phones into (I lost it when I sent them back for repair the first time).  Koss has some hard cases but one of the comments was that the case was way too big - not conducive to travel.

Overall Grade - A for sound, B for comfort, C for sturdiness, the missing volume control and case, and the minor annoyances.

Overall I'm pleased with these (would not have kept them for ten years otherwise) but perfect they ain't.

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