Without Calendar integration, it's not even worth my trying, and 14 days is not enough of a trial to learn a new system.
Contact sync as a free feature? Yeah, OK, that's what it's worth to me.
Right now, I use GTD-style tags in my business account and rely almost entirely on my business calendar for scheduling.
Without Calendar integration, I ain't movin'!
What might interest me:
* In the Free plan, offer Calendar and one of either GTD or Kanban (I'll start with GTD), and sync with one email account.
* In a step-up plan, offer either the "other style" or multiple accounts.
* In another step-up, offer everything, including Contact integration.
Then I might be willing to try it. But as it is, while I am unhappy with my ToDo management and really want something that works across multiple systems, without Calendar I won't move.