We recently purchased the SB-80 as having a shop move on the horizon I knew we had an awful lot of paperwork to sort out and a lot of redundant files along with years of customer over's to contend with!
The SB-80 arrived the very next day after ordering and I started putting waste paper through it immediately, I have found that the machine copes very well with a constant supply of old files to shred it's way through along with a constant change in paper weight and sometimes staples etc, it also makes easy work of CD's.
Over all I am very happy with the performance of the machine and so far after producing at least 40 large sacks of shredded paper the SB-80 is still shredding with no problems.