The last time we visited Grandma and Grandpa's house after a vet visit, we noticed that after a while, the puppies were really tired but having a hard time staying asleep for a nap because there weren't any little safe hiding spots. Most of the napping spots were in the middle of the floor in the living room, out in the open.
This time, we got smart and brought the pop-up crates. After we had been there a little while and when B&C started looking sleepy, we brought out the crates. They instantly recognized them as puppy caves and went right in. We set them up out of the way of everyone, in a slightly darker area of the room and left the door unzipped so that they could go in and out as they pleased. They both ran in before I could even put the blanket in. The puppies loved the crates and after playing with each other in one for a while, Mr. C plopped himself down on the blanket inside and went right to sleep for about an hour's worth of good, solid nap-time.
These pop-up crates are excellent. I don't think they would really contain a pitbull for any length of time if they wanted out, but what they do is they give your puppy a safe spot to rest when you are not at home. Even though it isn't solid, it makes them feel protected. We plan on using these when we take the puppies camping. They don't sleep in their crates at night when we are home, but our walls are solid and not made of tent material. In a tent where everything is louder and unfamiliar, I think that the pop-up crates will make them feel like they can relax enough to sleep.
So the answer to the question is... Friend. The pop-up crates are definitely your friend. So are the crates by the way. The crates give them a sfe place to go when they need one and also make separating them easier. The crates also help when they get a little too wound up before bedtime. As an aside, Mr. C doesn't really like the crate when treats are involved because it keeps him from stealing Miss B's treat away from her. Miss B loves the crate when it is time for treats because then she gets to take her time and enjoy the whole treat in peace without worrying about Mr. C taking it. He definitely lives up to the nickname Lunchbox.