Yep, have done that in the past using the sofa as a work table.
How would you react if you took your car in for MOT and the mechanic put his tool box on the bonnet?!
Besides the fact that it might raise an eyebrow from some customers (questioning your professionalism, I mean), not all sofas will stand on their front face and provide a work surface, they'll either rock around or fall over. If it goes forwards into the gas fire, smashes a picture frame and spills a vase of lilies all over the floor you're going to be in deep doo-doo!
Yes it is a little bit of extra effort carrying the table around, as I only have a Scudo so it kind of has to go on top, but it really does make sense after you've used it a couple of times!
Just my opinion, anyway
