I just tried the 48 hour trial off spotify on my iPhone on Sunday and was very impressed although it didn't have everything on ther I wanted to hear. Overall I liked. Now is it worth paying monthly for the premium service? What is is £9.99 a month? I have it on my iPhone and iPad as well. Presumably I'd only have to pay once? Is free version much worse? I don't want to save just listen to the odd few tracks on my dock of a Friday night. 