Very smart people that you can learn a lot from. Very open and trustworthy management. The company focuses on quality and that is great for learning, especially as a tech person. Great office space with lots of perks (e.g. hammock, sand volleyball field). Good working hours with optional working from home hours.
Cons
Maybe the fact that the main office in Odense is a bit outside the city makes it hard to commute, especially without a personal car, but there were always colleagues to pick me up.
The fact that their products are for big companies makes it hard for a developer to have to maintain support for outdated browsers or outdated features.