Another Dyson fan here.

We have a corded vac and a v8 stick at home; and a v6 stick-vac in the apartment.  All excellent.

The v6 is good for about 35m2 of carpet before it needs charging/emptying.  The v8 is good for about 50m2 of carpet.

In the house we tend to use the corded unit downstairs and the stick upstairs and on the stairs.

I find it difficult to believe the v10 stick would do a whole house - the bin is only 40% bigger and it runs for up to an hour on the lowest power setting.