Actually, I used Sonar, pretty much since the beginning of time (92 with Cakewalk for DOS). I still have X2 Producer installed. I have always had good experiences with it. I tried out Cubase because I got into more orchestral work and liked the idea of expression maps. I did the 30 day trial, and eventually bought it. In the end, I do think Cubase is stronger for midi if you are doing orchestral work. Not much of a difference for the typical EDM or rock band DAW. If you are not doing heavy orchestral, and starting from scratch, I would say pick Sonar or Cubase, both are good, but if you already have Cubase, I can't think of any reason to switch to Sonar. If you already have Sonar, I am not sure Cubase is worth the purchase unless you are dealing with lots of sample libraries with different keyswitching, etc.