I was able to put the bed together 100% by myself (a major plus! Got dad out of it!) Perfect size for my 5 year old son. Made his room twice the size it would have been with a regular bed. Not too high that I worry for his safety. 
I'm a smaller person (5'1'') and I feel comfortable climbing up and reading a book in bed with him. I bought a futon like mattress and it seems a big thin and not big enough to fill all the way to each edge of the bed, I think I will save for a good bunk bed mattress. 
For the price, GREAT buy. I plan to buy another for my daughter when she has to share a room with her baby sister. (would work great with a toddler bed underneath)