Guys at Superawesome just wrote an article where they explain how they are using activeCollab in their design agency. Here is my favorite quote:
activeCollab is the core of our operation. I can not imagine managing all our projects without it [...]. If you are in need of some help in this field – activeCollab is definitely the app for you, and once you start noticing the benefits you'll justify the price easily.
Full article with a lot of details about how they use specific features is available here: The way we work in activeCollab. Also don't forget to browse through their blog archives. Dragan is a pretty open guy and there is a lot to be learned just by reading how other people approach problems they are dealing with every day - communication, work with clients, etc.
If you want to share how you use activeCollab just let us know. We take every opportunity to learn more about our customers and how they are using activeCollab. It help us improve the tool and bring more value and useful features to you.

If you have something important to say about the issues discussed in this post please write at hi@a51dev.com.