They can be fun - once, for a quick change of pace. However, I don't participate often.
Flying NOE without breaking 200 ft AGL is fun, as it takes concentration and a certain amount of skill.
But being one of a swarm of 20+ planes popping NOE to take a base in under 3 minutes by virtue of overwhelming and unstoppable force is .... just not what I generally want to be much of a part of.