I started my relationship with Rotosounds back in the early 80's. Like a colleague here pointed out already, Rotosound were THE string to use at the time. And there is a very good reason for that, one reason that lives on even today.
Sound great, always fresh, ample choices, last long and are -overall- dependable and effective. In addition, there is an EXCEPTIONAL differentiation/competitive advantage between Rotosound and any other brand: the extra first string. Without being more expensive, Rotosound offers high quality strings + peace of mind: UNBEATABLE!