If you're familiar with Wunderlist, you'll likely find SquidHub quite intuitive. But besides being a powerful task manager for teams, SquidHub also provides you a team messenger and file sharing. Options you would need to look for in other applications if you were using Wunderlist.
Update: With the release of the Premium Plan new features have been shipped including permission control, copy groups etc.
Check the pricing and how it compares to other products: