Easy to assemble even for a very non-handy women as myself. Couple things I've learned though:
1) When attaching the back do not screw screws tight - otherwise all other holes won't align. Pretty much just screw them just enough to not fall out until all 4 are in.
2) sit doesn't have holes for the screws, you should just put them into the wood, it's not hard though.

Stools turned out beautiful and super comfy!