Well, the Morat house won't be popular.
We have a Henry - we had one each when we met but mine was rejected for not having the cable winding handle on the top - which is now at least 20 years old and on its second motor.
I bought a Neato D5 robo-hoover 3 years ago. Horace was about £400 but came with a 5 year warranty. According to my maths that's £1.53 a week to save me from suffocating in a drift of Basset fur. Sadly my maths is now off as we had to claim on the warranty last week because even Hungry Horace gave up under the immense pressure. I hope he comes back soon.
No, it's not as thorough as a proper hoover because it can't get right into the edges or behind the doors but if he runs once/twice a day it picks up an awful lot of fur which then _doesn't_ end up behind the doors or inside my PC. Also, I can do the hoovering from the pub