It's like a Loony Tunes cartoon: technicolor, corny, VERY on point and pointed, pitch-perfect for Its chosen era (pre-assassination Kennedy 1960s, and a gatling gun of jokes. It has a cast that It's a Mad Mad Mad Mad World would have envied, with Seinfeld, Grant and Gaffigan especially putting in great performances. And everyone looks like they are having fun. The Mad Men cameo was inspired.
Enjoy it! It is fun!