I do agree, you will wonder how you managed without it. Just had a week and not used it once...this is a rare situation.
However I think my machine does not look much worse than a smoke pro. I really don't think a smoke pro looks like 600 quid, sorry.
As I say, If you've got money buy a smoke machine, If you've got spare time and no money, make one it's not hard and works just as well.
I do not allow customers to stay and wait in my workshop so they don't see what I use anyway.
Shaun