I have 2 Cherryville 520, a 180GB and 480GB. Got the 180 about a year ago, and the 480GB about 6 months ago. I bought them for reliability and all the reviews I read before buying them said they were one of the top. I've had no issues with them yet, and they both get very close to the advertised speed, even with the 480 being @ 90'ish % full.