alaTest has collected and analyzed 35 user reviews of Sony 4 GB Slim Noise-Canceling Video MP3 Player (Black) from Amazon.com. The average user rating for this product is 4.0/5, compared to an average user rating of 3.8/5 for other products in the same category on Amazon.com. Views about the size and battery are on the whole positive. The portability and sound also get good views, whereas the durability and price get less positive reviews.