Sure I had an built in heater (wouldnt go without one). Auto drain and auto fill plus a remote system (which is just a plug in job which can be bought from b and q anyway).
This gives you the ability after setup to not have to return to the machine for a whole job.
I do alot of dirty end of tenancy cleans and this allows me to clean efficiently without having to stop and refill etc (mainly for the big 3,4,5 bed houses) no need for autofill on the smaller cleans.
Hope this helps.