Actually I just came here to post about my new flaps lol.
Needed? At first I didn't want, thought they'd look...out of place. I drove across a dirt parking lot after a rain, right after washing, and had mud and dirt ALL the way up the car, windows, probably on the roof too. Constantly filthy looks worse than a few flaps. I ordered some rally armors.
I originally ordered the $172 rally armors, started putting them on, 4 pieces of Polyrethane plastic. Shiny but good. Brackets were well designed. They had 2 right brackets, no left. For $172 they missed their one job. Being cranky lately (health issues), I looked elsewhere.
Found Rokblox. They're not shiny poly, probably not quite as durable but will probably still outlast the car (I got the shorties, can't imagine wanting longer). They're about the same plastic material as a separator in a trapper keeper (how I remember after 30 years??) IE, flexible, knurled plastic on one side, smooth on the other. Their bracket was simpler, just an L bracket and a round spacer, but they work and fit fine.
In general I'm one of those, under a few hundred, price doesn't matter, people, but didn't love the shiny for the extra price, and don't regret the rokblox whatsoever. Even $90 is a lot for 4 pieces of plastic.
The mud flaps, by the way, I actually think they look Good. pretty subtle, but pretty good.
I'd post pics, picture worth a thousand words and all, but a) they have plenty of pictures already b)my pictures are worth 10, maybe 20 words max, i'm awful.