As minimal as Wunderlist is, it still manages to include a few extras that help make task management a bit easier. For instance, if you sign up for a free Wunderlist account, you can sync all of your Tasks and Lists with the cloud, share Lists, and even add Tasks via e-mail. The app also includes a number of different backgrounds with which to customize your experience (though it would've been nice to be able to upload your own).
When it comes to performance, Wunderlist certainly has some room to grow. I found its automatic syncing to be unpredictable, which made me feel as though I always had to manually sync it. To help, I think developers could include options to set the frequency of syncs.
Another feature I found missing from Wunderlist was the option to sync with Google Tasks and Google Calendar. For some, this lack may be a deal-breaker, so I'm keeping my fingers crossed that Wunderlist's developers will add this capability soon. And if they do, I'd love for them to enable syncing of entire Lists, not just individual Tasks.