The ease of use! As soon as you open your account for first time its very clear how things work from thereon in with no extra effort required by users or event organisers/managers alike which I love so much about this tool compared other tools out their like BigEvents (which was really good). It's not perfect but we have had some great success using ivy even though our user base has grown since launch last year at over 500 members now!! We don't need any more features than what they currently provide us already however if someone does come along offering something new then why wouldn’t one consider adding them? There are many free resources available online such as Google Calendar etc therefore having an integrated calendar would be nice although nothing majorly negative comes into mind when thinking back through my experiences thus far. Our biggest challenge right off-the bat once going live after months &.