I joined this clan a month ago and have not regretted it.
What makes Warhaven a good clan to be in:
The leadership is organised and mature. Leaders and elders actually take active responsibility for the clan's well being instead of treating the title as a status symbol.
Clan rules are clearly defined and consistently enforced. Freeloaders, inactives and troublemakers are not allowed to remain in the roster and the clan environment is a comfortable one for everyone to be in.
Donations are very generous and quick, not to mention accurate. CC full of L6 or L5 wizards is the norm. Clan members go out of their way to give what special requests (hogs, wiz, dragon etc) that you ask for as long as you are prepared to do the same and keep up with the minimum donation ratio.
War at same time every week and every single member participates in war! It used to frustrate me when clans would lose a war despite you doing your best because of inactives or war non attackers. Not a problem here. Everyone tries for max stars. The leadership is also very good and at encouraging and guiding members if they need help learning to attack in war.
If you are a farmer who likes to war seriously one a week, Warhaven is a good place to be in. Give it a try!