Ichigo Mashimaru lurks around my all-time top five, and I thought the first episode of the OVA was at least as good as most episodes of the series: cute, hilarious, humane, and even deep. It's the kind of comedy that somehow reconciles me with the weirdnesses of being human.
They seem to have done a little more work on the backgrounds than in the series, but the animation looks just about the same. And the voice cast is just so great. Orikasa Fumiko...wow! The late scene with her and Nabatame Hitomi and Chiba Saeko was just perfectly done.