The first episode was rather special. I don't often watch fansubs but the positive reaction both here and at ANN convinced me to give it a shot. I was hugely impressed by the quality of the backgrounds and animation -- but this is often the case with first episodes. Still, IG often turn out some very good looking work, and Kamiyama is a fantastic director, so I remain optimistic that a similar level of quality will be sustained over the course of the series. What I enjoyed most of all, though, was the interaction between the two lead characters, both of whom are likeable and entertaining. I even liked the OP song, and I haven't paid any attention to Oasis since 1997!
Also, the original character designs are by Chika Umino, mangaka of Honey and Clover, which explains the similarity.