I was reminded of this truth today. My wife is a forgiving woman full of grace :-) who forgives me for not being enthusiastic with the vacuum cleaner. This might be changing!
We recently bought a Kone -> and I seem to find myself wanting to use it more often. We also have a Dyson for more regular vacuuming. I very much doubt that the Kone is better technically than the Dyson but I do think they got a lot of the usability and product design 'right' with the Kone.
So what do you have? You have a customer who seems to enjoy using the product and his wife will hopefully think he is a good man for doing so.