Hi Del
I avoid tape drives like the plague. After 15+ years in IT recovering "data" off tape drives has earnt me lots of $$$'s and plenty of frustration.
Probs: If the unit fails, is stolen, burnt to rubble etc you then have to match the exact technology (model) before you can do anything. This may take weeks.
The tapes stretch, formats fail, go out of alignment etc etc etc. Manually realigning a new drive to match the old one is masochistic. This may take hours (15 in one stretch is my record off a "good brand" drive).
Every PC (virtually) has a cd/dvd these days. Recorders and blanks are cheap and often reusable. Use them!
Cheers
Arron