Quoted from KozMckPinball:For experienced users of a roto: Is a floor stand or table top better? Ergonomics, slip etc.
It's all about your working space. Not everyone has that much free table space to work with to put one or two PFs out... and then still have space for all their stuff.
I liked the rolling rack for that reason.. I could move around it easy enough and move it out of the way when needed.
Being able to work on a PF from either side is a big bonus too.