The ease of use! I have never used any other software that was as easy/simple (once u get past learning it).
Also being able see where we are in our process at one time rather than having several windows open makes things so much more efficient when running events like this year's AOAM Awards event - which had over 600 entries from across Australia & New Zealand with 2 rounds per day plus evening functions etc., there were many days worth oof work!! We also love how quick acclameworks support gets back too us if needed after hours / weekends during busy times!