What do you like best?
Ease of use, intuitive interface, and simple aesthetics. Great synchronicity with mobile and desktop apps as well as browser version.
What do you dislike?
Although it creates notifications, I've found them somewhat inconsistent at times. As a result I created some fallbacks for important tasks whereby I also get an email and/or text message when those are due. That's overkill, so I wish I were more confident about the consistency of RTM's native notifications. RTM has shared tasks and delegation features, but they're not as intuitive or robust as other systems.
Recommendations to others considering the product
If you're looking for an individual task management solution, RTM is a strong one to consider. If you need to manage a team's tasks, however, think through the way RTM uses delegation because it won't likely be your strongest option for teams. It does, however, allow you to assign tasks and share them with some set up. Those features are not as intuitive or robust as its core functionality.
What business problems are you solving with the product? What benefits have you realized?
RTM is one of the best task or to-do management systems I've used. Its smartphone app is outstanding and its quick-add shortcuts save a lot of time when added a task once you learn them. RTM's design is simple, super functional, but also beautiful in its simplicity. Over the years I've created Agenda lists to bring up items with people I'm meeting with and it can easily work well with a range of task management methodologies, like Getting Things Done (GTD).