I just read this issue and I was totally amazed. If the Blackest Night main-issues shows this crisis on Earth, then Green Lantern shows this crisis in intergalactic proportions... The big ones of the Corps are here: Hal Jordan, Sinestro, Mongul, Carol Ferris... 
We have great art, plot, action, drama and all that's necessary for a good comic book! 
An Excellent tie-in to the great series that's BLACKEST NIGHT. 
An earned 5 out of 5!