not very good,,,the show is hardly going out on a strong note say like ds9 did with its final chapter.
the Olivia plot was just filler esp the kidnapping stuff. Acquiring the parts to stop the observers is getting old and repetitive. Also I've been disappointed by the lack of insight into the observers and if the observers can see the future I don't see how the resistance could ever win.
the only decent moment was btw Peter and Olivia but I'm lukewarm to the cliche of Olivia reaching Peter with love and warm memories,,,I think it might be more dramatically interesting to leave the implant in.