I like that it is very easy to use, all you need are your team members' emails/emailing addresses - no other information needed! However sometimes there's lag between sending an email notification which makes me wait before getting any feedback from users about my messages (notifications). It would be great if we could easily check who has read our communication by using some sort of dashboard or something similar so as not having this problem everytime. We have been managing project in different ways since its introduction but now with zubetake over control into one place everything gets easier than ever!!