This is a nice spot for a free camping trip. There is no bathrooms, there is no place to get water, and as others have said it does get dirty. That being said most people pick up after themselves so most of the sites are clean and the area is quite beautiful. We used this place after we could not get a camping spot in oak creek canyon, and we did notice that it was quite a bit colder than down in the canyon at night. Designated sites were sporadically spaced out so some were close together but there was generally a decent amount of space for each site. It was a busy weekend and there was still plenty of open sites on Saturdaynight, and it looked like most people packed up and left in the morning, so I imagine there's always sites available.
The only real negative was that the sites where people left trash looked destroyed, animals got into the trash bags and made a mess. There was a big party camping just down the way from us who blasted music until 1 AM, and it didn't bother us--the space is wade enough that the music wasn't too loud--but if you like your nature to be more peaceful then you might run into that problem. There was also some people practicing shooting nearby so we could hear the occasional pop-pop-pop in the distance but the area was for the most part peaceful, just families enjoying nature.
If you're looking for a quick and FREE option last minute where you dont have to check in and there aren't too many rules and you don't mind the noise other people make, this is a great spot. Just please pack out your trash.