This was a huge help in giving my daughter (16 months) a consistent sleep environment during our recent trip to visit family. It fit perfectly over several different pack-n-plays (we stayed in a hotel for a few nights, as well as at several different relatives' houses). My daughter is super curious about everything these days, so making it so she couldn't see the surroundings while falling asleep was a big help, and keeping light out no matter what the window covering situation was in our rooms was great. At bedtime we left the pod unzipped with dim lights until she was asleep, and then zipped up the door so we could turn the lights back on in the hotel room and go about our business. No more lights out in the hotel room at 7pm! My husband and I were able to hang out and (quietly) watch TV until we were actually ready to go to bed ourselves!
I do recommend using the fan that you can buy separately, as it can get a bit stuffy in there without it. With the fan though I had no worries about airflow at all. (Before going on the trip I actually sat inside the pod for a while with it zipped up to test it out - with the fan it was quite comfortable.)
My one regret is that we didn't buy this sooner, as we've done other travel with our daughter that was harder because of inconsistent sleep environments.

We got this for when we will be sharing a room with a baby and a toddler and will not be able to control the environment as much as we like. Seems well made. It takes some space to put together but it’s not any wider than a pack n play when you’re done.