Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Terrible Experience with memorex 700mb 52x cdr

I bought a 100 pack of the memorex 700mb 52x cdrs, and, while they worked at first, after a month or so they all produce "power calibration errors" on my sony crx168b burner, winXP pro, piii600, CD architect, EZCD, etc.. The burner works fine with all other brands. Have not been able to test on another burner, but even this performance is unacceptable. While I have had sucess with memorex in the past, I will look for alternatives in the future. I hope I can save someone the trouble I experienced.best,jbg