Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Memorex 700MB/80 CD-RW don't work

I bought a 25 pack or these CD-RW discs and tried to use them on 3 PC's and could not get them to work. I tried ROXIO to format them, and got a media failure on one disc, and it took 13 hours to format another - which then would not work. The 3rd disc took 3 hours to format, which also would not work. And then I tried to just write to 2 others - and they hung up my CD drive. So I am taking these back - and buying Maxwell's - which have given me no problems.