Mmm, interesting set of responses and surely the most restrained and yet thorough Truck Mount / Portable debate this industry has ever seen.
The reason I use a Truck Mount is very simple and very basic. As a professional carpet cleaner I cannot offer my customers anything less than what I know to be the best. The best machines, the best chemicals, the best tools and yes, the best training (thank you Ron Tilley)
That doesn't mean that I think that I am the best, far from it, it simply means that I strive to do the very best job money, tools, machines, knowledge and experience will allow me to do and boy-oh-boy has it paid off.
Simon