What does the company do well? Their drag-and-drop system for moving tasks around is fantastic - and the timer built into the platform is so helpful when you need to track time that you've spent on projects for billing, etc. I don't have to wonder how much time I'm spending on a whole, or have to round to estimates.
What does the company not do well? The user interface could use a little bit of a facelift - simply in that it looks a bit dated.
What about the company do you wish you had known before purchasing? N/A - Their free version has so many useful features that I've never felt the need for the premium version, as I use it mostly as a to-do list/task manager.