I have to admit I liked FSN, but mainly because of saber. I really loved her as a character. Rin was also fairly good, but everyone else didnt really leave that much of an impression. The story had a lot of potential, but didnt make use of it. And, yes, it was indeed rushed. I would rate it average, an average anime with a great main character. (something like bakuretsu tenshi and Jo). When I say great character, of course it is both appearance and character wise, where shiro is just fails. I have to admit shiro pulled down FSN a few ranks for me personally.
Still looking forward to the ending though. I hope they dont end it as rushed as how the series progressed in the later half. Also, I hope it is an actual ending, not some vague cliffhanger with lots of loose ends. Still hoping for a happy ending though, personally. I like tragedies as much as the next guy (chrno crusades ending is a masterpiece), but I just hate farewells.