I saw the heavy duty bunk beds from ESS Universal at a conference and liked how they looked. I climbed up on the sample bed and tried to tip it but it was as sturdy as the big wood beds we were building. I placed an order for 10 bunks and mattresses and they are amazing. They were easy to put together, sturdy, easy to clean, comfortable and they look great. The mattresses are the best ones we have in camp and now all the adults want to sleep in the building with the ESS beds. I will never build another bunk bed again.