I really liked everything about this product! It was easy to use for our small team of five people as well as being able to customize it with all kinds of features (and help from their support staff).
The interface is very intuitive which makes getting started quickly less daunting than some other tools out there. We used caravels during one stage in an ongoing development process at work where we were trying new things such as DevOps practices like continuous integration/deployment etc., but also just doing more agile ways of working internally.