Well, finally had time to download and view the film.
I'm very impressed for someone who is not normally a fan of the Warner/DC animated pantheon. Perhaps it's me, but if DC could bring this kind of commitment and zeal to their live action films, Marvel could very well have a fight on it's hands.
As for the plot itself, I immediately thought of "Training Day In Space"... and I'm sure others have seen that similarity as well. The GL origin is laid out fairly quickly with a minimum of exposition/back story, and cuts right to the plot of the Jordan/Sinestro pairing.
The voice-over work is excellent, and while Chris Meloni is a bit flat at times, he does yeoman's work. With a few more projects like this, he should find his stride very quickly. I was blasted into the past by the voice of David L. Lander(Squiggy from Laverne & Shirley, for those of you as old as I am...), and it's good to see he's staying busy.
The animation is top drawer, with few CGI elements to distract from the classic style this feature showcases.
Would I have bought this normally? I'll be honest and say probably not, since I am not a regular comic reader/viewer... but I will say this. Viewing it has generated enough interest from me to spock out the rest of the animated films in Warner's DC library.
Besides... looking at the other titles, I notice that Michael Ironside is the voice of Darkseid... and I am all over that like a hobo on a ham sammitch!