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

Input:
There's a reason why nothing has changed about these headphones since Koss introduced them in 1984- they work. First, let it be stated that you're paying about $40, not $400. Nobody famous endorses these, but I would if I was. The sound is phenomenal for the money: a sweeping soundscape which delivers satisfyingly thumping bass while maintaining a pleasant overall balance. The open design lets you hear background noise, but just enough to keep you aware, not enough to interfere. The design is not as stellar, 80's retro styling aside, the earpieces feel cheap and flimsy at times, and the collapsing metal band will wrap around your neck and pull your hair, but the on-ear fit is very light and comfortable. HERE'S THE IMPORTANT PART: There's a no-questions-asked lifetime warranty. So if the flimsy plastic breaks, $9.00, a box, and shipping to Koss headquarters in Milwaukee, and you've got yourself a free replacement. For life. I could not be more satisfied after purchasing these.

Tl;dr: Great sound, low price, passable design, lifetime replacement. Buy them.

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