Thanks Pete. I use the printer almost daily, so tubes/print heads drying up probably wouldn't be a problem.
Some of these systems cost less than two regular cartridges, and if used on a regular basis (in other words, kept clean and operating), it's equivalent to something like 25¢ a cartridge over the life of the system!
No other opinions/comments on this issue? You must enjoy paying through the a$$ for printer cartridges, eh?