.. not many plots in here and some are realy obvious but zero no tsukaima isn't exactly the kind of anime where serious and complicated plots would fit in.
Art:
Its the usual anime.. looks good, can't say much bad about it.
Sound:
The sound fits realy well and I loved the opening song :)
Character:
ah.. this is anime is kinda wierd, first and for all.. don't forget that the main characters have the mentality of 12 year olds(not including the idea of punishment.. you will understand once you've seen louise angry) so.. even if certain things get explained and feelings start to develop.. there never is much of a change in the situation(which is good or else half of the humor in this anime would be gone)
There will the occasional side story but the main characters are the main characters meaning that they will appear in everything and anything.
Enjoyment:
warning: you could die while laughing
realy, this anime's strong point is its humour and there are very few episodes in which this won't be seen.(make sure you get fansubs that explainsome of the jokes aswell)
Overall:
I lost my voice after watching the entire serie in one go because of all the laughter(this probaply won't happen to everyone unless you laugh as much as I do) This is one of the funniest anime's out there and its worth a try(theres also a little romance in it)
