I have owned one for a year this month.
I also run a tm and a twin vac prochem portable
The cub has been 100% reliable and the return on investment better than any other machine ive ever owned in 22 years.
We have run it van mounted , it is light to carry up stairs , excellent on upholstery and fast for set up .
For bigger jobs obviously more filling and emptying is needed , we use 25 litre drums for clean water and have a wate hose attached when van mounting, but on a typical domestic running 25/50 feet of 2 inch hose , cleaning up to a full house the tank size is not an issue.