United States
iRobot
Defined the category and still has the widest service and parts network in the US. Spec numbers read modestly next to the imports, and suction is not published in pascals at all.
iRobot sells through US retail rather than direct import, so a warranty claim is handled locally and replacement rollers and filters sit on a shelf near you. The trade is a spec sheet that looks thin beside machines that lead with a pascal figure.