Normally I pull up, wheel the porty (Jag) to the door etc, plug the Zeta into an outside tap and electrics and rely on that for constant, red hot water supply. The porty has auto dump so there is no bucket emptying and certainly no filling from an electric shower.
I can now appreciate how much of a ball ache and a waste of time the whole emptying/filling really is and I can definitely see the benefits of running a TM.
I just wish I had 3 jobs a day to justify buying one.....

But as far as getting great results go, I'm more than happy that I am doing just a good a job as the TM boys... (And girls!)