I'm a solo performer.Its critical for me to record my performances for self-evaluation.Using CD-R's all the time proves very costly and actually wasteful.I couldn't find the CD-RW's anywhere in local retail stores...only for computer.These discs at Amazon are perfect.I've been using just one over and over again since receiving a box of 10 .They're excellant and worth a hell of a lot more than their price.I'm set for years!!!!Chuck Paul