I loved this episode. Fringe is one of a hand full of shows that can make me genuinely empathise with the characters. I don't want to talk too much about this episode, just the ending.
When Olivia was trying to convince Peter to remove the tech, I was literally tearing up and saying "Please Peter, Please, take it out. You love Olivia, she is right emotions give you When Peter started to remember all the good times with Olivia, I actually started to cry. I was so happy that he removed the tech.
Also, I was glad to see that Winmark is now back on the timeline that Peter wanted him on, so they might still have a chance to take him out.
Special mention again for Joshua Jackson and Anna Torv's brilliant acting. Great Episode.