I have the Storm and a Magma, excellent machine, don't know how it would compare to a custom built though. I have only recently got the Magma and won't use it on every job but just those that need a bit of extra umph!!, heats up in a minute or two and I have hot water at the wand and that's using 50 foot of solution hose with the magma connected to the main machine, could get it even hotter if used closer to the wand. Have a look at the video on the Cleansmart website.