first two seasons are incredibly good with fast-paced storytelling, interesting characters, and compelling dynamics between them. the middle two seasons are... decent. the last season was so bad and unnecessary i literally have still not finished it. what the everloving FUCK was that. 5/5 for the first two seasons, 4/5 for the middle 2, a good 2/5 for the last one. sorry.
also, nairobi is a lesbian and you will never change my mind. she and raquel are the best characters by FAR.