Wunderlist is so simple. It's layout is clean and very efficient. It allows me to keep track of what I need to get/do in an very orderly fashion, which I am a huge fan of!
I do wish I could share some of my tasks/items to get with people outside of the app. I haven't seen that feature just yet. It's not that I'm going to stop using Wunderlist because of that, but it would be another pro to the app.
Use all of the features, new and old! Be sure to do your research so you fully understand how beneficial Wunderlist can be for you and your team.
I use Wunderlist primarily to keep track of things I need to do while traveling for work or items I need to pick up/drop off. It keeps everything in one place and makes my life a whole lot easier that way.