I'm always torn with these clip shows. We understand that there is a big event coming up, but we don't need a clip-show to remind us. Very little actual plot took place outside the clips, we saw that neither Monica nor Chandler could write their vows, which in some ways, detracts from the main storyline and makes you think that maybe they shouldn't be together.
Sure it was fun to look back on these moments in one big swoop, but was it really necessary?
The only reason I've scored this a 7 is because I love this show and can't bear to give it a lower score. But it's no wonder that this was the least watched first run episode. It wasn't necessary at all.