Rotosounds are my favorite strings.
I am a full time musician. This means that I practice several hours a day and often have live performances. I'm primarily a slap player and even so, Rotos rarely brake (I've broken only two first strings after two months of abuse on my practice bass for over six years of using them. They have nice mids and clear lows which makes them great for a more lead style of approach to the instrument. I find their price good. The tone and quality are consistent among different sets.
The only "drawback" I could think of is their distinctive sound. It just doesn't suit everyone's taste.