This product is slightly on the expensive side but we like that it is the perfect length for a twin bed. Another reason we chose this product is because it can be easily folded down, allowing me to climb on the bed with him for his bedtime story. The installation was simple, though the instructions seemed to show an extra part... possibly for an extra long version? Anyways, it was easy to figure out.We installed this on a metal frame bed. It was tricky getting it to stay in place, but we used command picture frame hangers (the velcro-like ones) and it worked like a charm! I think it would work best on a wooden slate bed that can be drilled into, but our hack has worked so far without any problems. There is a rope structure that you can strap to the other side of the bed and that alone would not be enough to keep the product in place. Our bed is a twin so we had a lot of leftover rope but this means this product can also be used on a queen bed.Overall, this product does what it’s supposed to and folds down easily. The metal bars are padded and feel strong. I’m not sure what would happen if my son directly fell on top of it, but I don’t think there would be a problem. The only downside is that the folded down part is raised from the actual mattress bottom so making the bed can get a little tricky since you have to tuck it into the side but it’s a minor problem. I would rather have a hard time making the bed than to risk having this fall off the side and my child injuring himself.