It was bright. It was colorful. It was a fun idea. It just wasn't funny.
The first 3 seasons were great, but the last two have been horrible. The episodes became predictable, cheesy, and the dialogue is really bad. It's like they fired their writers and hired the creators of Sharknado.
Watch the first three seasons, but stop there unless you want to watch something cringe-worthy.
Brooklyn Nine-Nine consistently delivers a winning show. The characters are fantastic, and each episode is packed with great jokes.