I never had problems with zip disks myself, but never
dove into the
floppy
things since the price seemed prohibitive.
I can't say either technology has been bad to me. I have found IDE and SCSI zip drives
excellent for exchanging large amount of data between vintage and modern system. The LS240
drives are very reliable as well and I have not had any media issues. Plus, like Chuck
said, they are so much faster than standard FDDs for regular floppy disks.
-Ali