alaTest has collected and analyzed 29 user reviews of Evoluent Mouse-Friendly Keyboard - Silver / Black in color (NOT purple / black) from Amazon.com. The average user rating for this product is 3.6/5, compared to an average user rating of 4.0/5 for other products in the same category on Amazon.com. People are impressed by the reliability. The size also gets good feedback. Many are critical about the design.