I haven't used them, but they advocate very research dependent trading systems ( a mix of fundamentals and technical). If you subscribe to this school of thought, (and there is a lot of empirical evidence to pack up such theories - google Piotroski or Canslim, for example, as fundamentals based trading systems) then a subscription is very much needed unless you are planning to do this enormous amount of research yourself (not likely, IMO). Now as for the quality of the research, that I can't say - perhaps a trial account can help you ascertain?