EZbass sounds great but does not - in my opinion - live up to Toontrack's EZ line of applications.
I am a loyal and happy Toontrack customer. My Toontrack product manager tells me I own 93 Toontrack products. I have had nothing but great results with EZdrummer 2, EZkeys, and EZmix 2.
I do not find EZbass easy to use at all. I've watched the Groove3 course for it, and while I found the course informative, I never reached a point where EZbass was anything other than frustrating for me to use. My dream bass player is probably Adam Clayton, so it's not like my expectations are inordinately high, either.
I tried importing a chord progression from EZkeys and got puzzling and unusable results. I tried programming by hand and found it frustrating and unrewarding (and unusable). I tried playing in parts on the keyboard and concluded that if I had to do that, I'd rather be using something else.
I am aware of and happy for the MANY satisfied users of EZbass.
One final observation: The exclusion of a simple (or even complicated) way to create parts exclusively for a four string bass - as opposed to five string - is mind-bogglingly inexplicable. If I were to list my top seven thousand albums of all time, none of them would feature a five string bass.
I encourage other EZbass users - especially satisfied ones - to review this instrument.