alaTest has collected and analyzed 13 user reviews of Royal Blue Blackberry Trackball / Joystick / Navigate / Pearl / Ring Repair Replacement Fix Fixing for Rim Blackberry Pearl 8100 8130 Curve 8300 8310 from Amazon.com. The average user rating for this product is 3.3/5, compared to an average user rating of 4.1/5 for other products in the same category on Amazon.com. Reviewers are impressed by the reliability. The price also gets good reviews. Many are less positive about the usability.