***This review WILL contain SPOILERS***
I thought the episode was a fitting send-off, and was almost perfect. The pacing, for the most part, was great, there were lots of allusions to earlier episodes, and we finally got to see Fry and Leela get married "for real" (rather than just the glimpse we saw in the time-skipping episode).
The reason I can't give it a 10 is because of the very end. If the writers had closed it off, and had Fry and Leela *stay* in their frozen time, it would've been perfect. Going back to the moment before the time button was invented reset everything and, IMO, robbed the audience of final closure. They're going back to a time when they're not married, and technically, there's no assurance that they will be, since a lot of what happened subsequent to the time button is dependent on it.