Really easy to put up. I did it alone while my baby watched me. The box is super heavy! It's around 65 pounds. The FedEx guy was nice and brought it into the house for me because how heavy it was. The box it comes in, I struggled getting it out of the box so be prepared to be frustrated with that. Once you get it out of the box it's really straight forward on assembling. Oh, the hardware it comes with two packets one for the bed and one for the trundle, the one with is wrench is the one for the trundle and the one without it is for the bed. I didnt realize this and they arent marked. Luckily I caught it early so just a heads up.