A lot of integrations, calendar reminders, usability
I use Google Calendar to schedule my day and to plan all the events and meetings. There is one great option for - Google Calendar integration with TMetric, this allows me to track time spent on various activitiesRob Russell has used this product for one year.
Fast, simple, lots of integrations
Desktop design is outdated
Holding out until the end of the year when the new desktop design should be appearing