After Shuffle!, Love Hina, Daphne in the Brillant Blue, Tenjou Tenge, Najica, and the mangas of Ichigo 100%, Negima, and Gacha Gacha, I became immune to panty shots and the overwhelming majority of fan service. I didn't even notice the panty shots while rewathing the first eps after you mentioned it.

It's really not that big of a deal, the series is still funny, and I like the cast.