After several years of use, my Roomba 770 bit the dust (as it were.) I just got my new Roomba 890 in the mail. I quickly plugged it in (to the old existing dock) and turned it on. It spoke a few words to me and then got to work.
It's advertised as 5x stronger than the last one. I'll vouch for that. I'm already in love. It's stupid how much I love that thing.
Edited to add: I just checked back in my blog and discovered that, yes, the roomba was my longest-lasting employee at just over 3 years.
https://gwendally.livejournal.com/941486.html