it takes roughly an hour to unload and set up the full system, and around the same to pack away.
It can only be used on certain jobs - upto 5.5m gutter height, with space below to set up, no major bridging etc. but on those jobs it gives us an advantage. It's also good for small jobs where only one section is needed which can be much faster to erect. You need a good roof rack to carry the heavy 4m platform, and racking system in the van to allow you to pack it in the van while still leaving room for the rest of the kit you need.
I am pretty sure it was setting up the solar deck in the cold this winter that resulted in me pulling a load of muscles in my back though and putting me out of action for a month, so watch how you're putting them up.
I'm pretty sure it's paid for itself within a year, 2nd hand, I couldn't justify the cost of buying it new I don't think.