The Roomba is the single worst tech product I've ever purchased, and I've brought a lot of junk. So much more hassle than running the hoover round a few times a

The Roomba is the single worst tech product I've ever purchased, and I've brought a lot of junk. So much more hassle than running the hoover round a few times a week. I wonder what thier repeat purchase rate is? I suspect it's not that significant beyond a few die hards.