Limitations that I found
I liked the tool. I even made me a pro user.
But in the end failed because it couln't sync the smart list with my outlook or blackberry (my everyday work tools).
The web page I found that was not so easy to fill a task. If I want only to put the task name, it's Ok, but is I need to put due dates and other categories, I found myself having to do too much mouse clicks to fill field that should be immediately available to fill.
In the other end, I found the iPad app Gerry solid.
Maybe in the near future when they overcome this limitation I could try again.