What a perfectly rounded episode. A single strong storyline involving Elaine moving into Jerry's apartment and its subsequent regrets and changes.
It is perfectly clear that in this early episodes Jerry is the protagonist of the show. The other characters interact with him (mainly George and little Kramer) but they don't have proper individual stories. That hurts the episode in some way (we want more Kramer!) but it also lets it focus and strengthen its already great idea.
Right from the opening the story begins and it never stops until its very end. Twist and turns in the middle but so much more also. We get quality social commentary and totally relatable conversations/situations. I love it that in this early seasons there are a lot of parties or dinners, mainly a lot of social situations that kind of seem lost its focus on the later seasons. The everchaging scenario for Jerry is always keeping the story moving and the stakes getting higher.
On a side note we a great scene with George pretending to be married in order to attract women (classic George) and a fantastic dialogue between Jerry and Kramer regarding the K-Man un-human nature.
Overall, I feel a lot of the early episodes got lost in the shuffle and nobody regards them as they should. These are greatly written episodes with funny social situations and even if the tone isn't fully realized the foundations are there.