I like that set time has been around since 1999! A lot of features are very useful when you need them most (such as automatic reminder emails).
The calendar view could be improved by creating different categories or views such as "today", next week" etc.. You also cannot add events from outside applications without going through some extra steps in order to import data into your account via CSV file format - this requires installing additional plugins though; not sure if they have any free ones out there but definitely worth looking at because other event management systems do allow importing directly so no hassle here either way really!! It's great being able too plan my schedule ahead rather than having everything planned last minute- saves me getting stuck doing things twice.