I enjoyed it. I also squeed a little whenever and "old" face popped up. I wasn't expected too much after Ark of Truth. I liked AoT until the Replinator. That was too much for me. This one, from beginning to end I really really liked. I would have liked more Jack screentime, but the little bit we got was pretty good.
To the comments about things slowly dissappearing in the beginning: My take on that is that Ba'al was making changes slowly, and each change net a dissappearance in their future. Just my 2 cents.