We brought this bed guard, as we were going on holiday in a caravan, and knew that the travel cot was going to be to big to put in a small caravan size bedroom. It fitted perfect. Took 10 minutes to work out, but once you have worked it out, very easy to assemble the next time.
Just started to use it on our cot at home. We have a cot bed, fits perfect, borrowed a friends guard, and it didn't fit the slates on the cot bed very good, but this one does. We have a tall toddler so it's a good size guard, doesn't roll out and can't get through the sides. Would recommend it.