#1 - functionality. if it doesn't do something i'm interested in using, i won't use it. #2 - ease of use. if its ridiculously complex, i'll still probably us

#1 - functionality. if it doesn't do something i'm interested in using, i won't use it. #2 - ease of use. if its ridiculously complex, i'll still probably use it, but i'd jump ship for something easier if something were to arise. simplicity = productivity.