Task: Sentiment_Analysis
Instruction: Analyze the user's review text and determine the overall sentiment expressed, then choose the corresponding sentiment option from the provided list (A: very positive, B: positive, C: neutral, D: negative, E: very negative) based on the identified sentiment.

Input:
The Rio Volt has lived up to expectation in just about all ways.  The first thing I did was install the firmware upgrade, which was a piece of cake.  Then I experimented with various burned formats:  CDR, CDRW, with/without sub-directories.  So far it has behaved flawlessly.  My only real complaint thus far is that the Headphones are kind of weenie (they sound ok but I'm not an earbud fan).  Compared to the "download to mp3 player via USB" approach, I much prefer the Rio Volt's cd-burner approach for 2 reasons:  1) a  reusable 650mb CDRW holds a LOT of music and 2) all five members of my family have become quite proficient at burning CD's.  I would recommend the Rio Volt to anyone who is into MP3 listening.  Next step:  Get this functionality into my car...

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