I watched it twice last night, and thought it was hysterical. I do think you have to be of that generation, to get all of the wonderful references, but I am and was delighted to be reminded of them. From the Silly Putty, Walter Cronkite and the drinking joke, Jan 6th, and the not to be mentioned advertising crew had me on the floor. They came out of nowhere and were delightful. Sinister Hugh Grant stole the show, he was fabulous.
It's pure Seinfeld silly fun. I loved it.