I like that it is easy to use, you can access your account online from anywhere in Norway or Sweden with an internet connection! My only dislike would be if they were able implement more options for calling numbers outside of their own country (like international calls).
Easy way to manage all our phone lines at once as well - we've been using this since 2008 but have had some issues over time such has them not being updated when new features are released by other providers etc., just keep going back until one works best!!