Last summer I bought a Grand Trunk privacy shelter that goes up quickly, along with a three-gallon solar shower bag.
I basically pull it up, and the top clicks to the four arms running out to the sides. Then it's four legs click in place in the center, when extended all the way out, and it's up. Pretty simple, and only needs one person to do so.
Velcro staps also old it tight to it's four legs.
The first time I only staked the bottom of it to the ground, but then when hanging a filed solar shower bag from the top center, it wanted to twist and fall over due to that the water bag was not directly centered inside the tent. So it does need the cords from the top of the tent to be staked as well so no one gets exposed.
I did place a tarp under the tent, but it also has it's own floor (as shown on the right in the picture below) that can be put down or left on the side of the tent. It also has several inside pockets, and is rather large inside.
When taking it back down, I was surprised how well it folded up and fit right into the skinny bag it came in, and even zipped up without a challenge.
When I arrived home, I set it back up in my driveway to spray it out. It will stand on it's own without being staked. Nice! And I'd give it five out five stars as its well thought out and quick to put up or take down.