I've always used both server side analytics and JS based analytics, some external analytics tools have been long in a black list by EasyPrivacy and their consta

I've always used both server side analytics and JS based analytics, some external analytics tools have been long in a black list by EasyPrivacy and their constant addition and removal of those services from that list means sporadic stat charts. The only problem with server side analytics is that they're pretty limited with functionality unless you have your own internal analytics system which can track alot more information than just page views and general traffic stats.