This is a very stable and safe unit. That being said the only issues we have with it is the fabric. 1st there were no instructions on how to put it together. (there were detailed instructions for building it) 2nd Caleb,our grandson picked this color because his favorite color is vibrant yellow. We did not get vibrant yellow but a very
faded out pale yellow. Extremely disappointing. We  now have to change color scheme of room. 3rd The yellow panel was not placed as shown in the picture. Had we known this we would've gone with the solid blue. One suggestion - maybe put handles on the top outside of the ladder to make it a lot safer. All in all it is great !
Caleb loves everything else about his castle bed and will enjoy many hours playing and sleeping in it.
In the pictures that I attached, the first one with the bright yellow on the right is from your website the rest with the dull yellow and backwards color scheme is what we got and assembled. 
S. Joyce