I don't use one anymore. I don't even have one anymore. I figure if ever there comes another time when I need to transport projects to and from a lab, then I might use Zip again. But... now keychain USB drives are cheap as heck, and we've had CD burners for a long while now. I just don't see the point.
I had a customer come into the store the other day looking for a new computer. As they ran through their list of requirements, one of the items they touched upon was a Zip drive.... I calmly explained to them that it's near impossible to find on any computer in their price range. I suggested a move to CD-RW
My zip drive got a bad case of "The clicks of death". I ruined many a disk on that drive. USB key drives have become so much cheaper, and for archive purposes nothing beats a CDR or CDRW, save a DVDR or DVDRW. I make periodic backups of my research work to CDR.
All the GX260 and GX270 editing stations at school have Zip250's. I don't use them too much, but the students use them to death. It's the only way to move audio data between the video stations and the audio stations. And it's always a laugh to watch someone trying to use the GX150 Internet station to print some homework or somthing, they can NEVER find the floppy drive and keep trying to put it in the zip drive.