This is a great tent bed and best price of all. I've researched many different options and if you don't want to spend $150, this is your best option. It will NOT fit in a queen bed (I tried as one child is full and the other is a queen), it is about 6 inches too small. on the long side of the bed. You might be able to just sit it on the bed, but I suspect it will move around a lot while in full position stretching around the mattress to stay in place. Overall fair value for the price. I want them to make a queen like I would have bought right away. I've seen a few questions about this so I'll add that only one long side opens and there is velcro to pull back/open. You can also put a side rail on it as shown in my picture but I need to make it smaller so it can go in and out from one side.