Hello! Did not find the calendar suitable me it is better than yours, but all the same could not satisfy one small requirement. Business concerns tasks. In all calendars, lists of affairs, books of problems and schedulers which I saw - accomplishment of a task can be put only for some specific time. The task cannot set an interval of time for accomplishment. I can create an event which will last certain time, for example, "a meeting from 10:00 till 12:00". But on accomplishment of some tasks time is also necessary, they cannot be made at once. Would be very abruptly if you created such opportunity. For example, a task "to study from 10:00 till 12:00" upon accomplishment we put a checkbox. And still, very strongly there is not enough opportunity to establish links to several personal contacts. This function is useful, and I saw it in few places, but one contact often is not enough, it is necessary two, and 3 are better