I didnt want to check yet another task manager, but initial reviews convinced me of giving it a go. Im now using it both on iOS and OSX and its great! I find it is the perfect tool to deal when things get too cluttered and I want to focus on just the most important tasks that I need to get done. As long as it is robust, this app is a keeper. Congrats to the developer!
JRFocus about Doo - Get Things Done, v1.2.0