[bonniemuffin]

Totally agree. I just checked my order history: I bought my current Roomba 650 in May 2014, so it's been running 4-5 days a week for almost 6 years straight with various simple part replacements. Really great little product, and excellent customer support and user community.

At one point the tread wore out on the wheels, so it was struggling to get over the threshold into different rooms. Rather than buy a whole new set of wheels, I found a blog saying that Kirby 301291 vacuum cleaner belts just happen to perfectly fit on roomba wheels and work as replacement treads. Now it's been happily rolling around on vacuum belts for the past year or more.