Fronter is working really well here at my secondary, but I am not a techie and not overly bothered about customising to any extent. It is being used solely to deliver content to the students and with that clear aim, its made it easy for staff to get on board as they know what they are doing and are enthusiastic for it.
I understand why people do not like it, but if you a want a easy to manage solution it works. Oh and its free for us, so that is the biggest plus.
If I was to buy, we'd look at frog. Looks good to me.