I think it was fine. Not wow (as some say). It was nice to get new b5 content, which hopefully gets us more in the future if the numbers are good enough.
It wasn't the greatest thing ever, but it was a gateway to a reboot, it was a nicely done nostalgia-fest and it did a lot of stuff right. Was the animation a bit cheap? Yes. Was the story a bit thin? Yes. Would I still watch it and buy the blue ray? Of course!
And it's still way better than a lot of stuff movie studios wanted to stuff down my throat in the past years.