This was surprisingly good. The story was great, these two episodes alone were better than the live action movie. The script was good as well, with some emotional stuff towards the end. The whole thing had a nice sci-fi feel to it, with Hal and Kilowog being sent to the frontier of Oa territory in the fastest ship ever built. Almost sounds like another sci-fi show, doesn't it?
The animation took some time getting used to, but at the end I really liked it. The only time I felt it didn't hold up was on Earth. Thankfully, that didn't last more than a couple of minutes. All the stuff in space and on Oa looked great and the Shard (Red Lantern base) looked amazing.
I would definitely recommend this and I'll gladly check out the rest as well.