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

Input:
The quality of the material may not be the greatest. But these are extremely comfortable headphones that produce sound equivalent, if not better than, most headphones that will cost you over $300. I wear my MDR-V6 for hours at a time while studying or just listening to music for enjoyment and the sound is flawless to my ears. I listen to symphonies, operas and many varieties of heavy metal. I highly recommend these headphones for listening to any of those three genres of music as they make the music sound exceptional.

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