I strongly recommend against purchasing this bed. The quality is poor, and the instructions aren't just bad, they are actually incorrect in a way that make you want to backtrack, and cannot be followed to successfully construct the bed.
Update: After less than two months and only two nights of a teenager sleeping on this bed, both the slats and the frame have broken. Wayfair will not accept a return on it. Terrible quality, waste of half a day to build and absolute waste of money.
I am a hobbyist woodworker and have also assembled probably hundreds of "assembly required" pieces of furniture in the past. It took me over three hours to assembe this, even with a power drill to screw in the slats (which would have taken forever with a screw driver).
The instructions really go wrong when you start to assemble the drawer/trundle. The hinged brackets that you attach to raise and lower the bottom matress when the drawer is pulled out are actually illustrated backwards in the picture, and they continue to be illustrated backwards through the rest of the instructions. Despite having the numbers and letters set up properly, the illustration did not match what i was building so i spent a lot of time trying to recheck all my work, getting my wife to check my work, attempting to install the brackets the opposite way and finding you couldn't. Finally i just pressed on with the rest of the assembly, largely ignoring what was there and i was able to get the bed together and working.
There are warnings in the instructions about being careful to find loose fasteners in the boxes. All of the bags of screws and washers were in tact, but i was missing both washers and lock washers in the first half of the assembly, and so had to just go without them.
The assembled bed doesn't look like it does in the picture. It is the same overall shape, but the trundle drawer is very hard to get to sit flush, and easily knocks out of alignment. there is a gap where you can clearly see the lower mattress when the bed is pushed in.