I got this to go places my Roomba can't. For example under furniture. But it only goes under my sofa. Anything else, double armchair, armchair, TV stand, locker etc. (see photo) is not suitable. Even a crevice nozzle will not suffice because the diameter of the pipe is too large. Look at the pictures in the Revain ad. In the picture, furniture is too low for the vacuum cleaner. Stairs: Yes, it fits on the horizontal part of the step, but don't cover the vertical part with carpet because theโฆ