I have had different kinds of bunk beds over many years and these are by far the best. They are very solid and sturdy. They dont shake. It was very easy to put together as long as you know how to follow instructions. I did it all on my own for 3 hours and just needed my husbands help at the end to place the top bunk on. I also like these because it came with a lot of slats that are also tied together. Other beds have very few slats and make the mattress dip in places and this 1 does not. Plus you screw them into the frame so the slats wont ever slide out of place. Me and my boys are very happy with these bunk beds!