the series generally receives high marks for technical aspects. cunningham feels the animation is flat-out gorgeous, but crandol considers it merely above average. in the latter's opinion, its quality wanes as the series progresses and increasingly relies on super-deforming the characters for comedic effect. adv's release earned praise for the quality of the video transfer and the dvd extras (particularly the vid-notes). reviewers especially appreciated the english voice acting: crandol calls it brilliant, and several note that calvello and wolcott were each able to capture mitsuishi's excel. pearce, in contrast, found the english cast to be pretty bad and its excel to be "dental drill shrill".