Pretty easy to assemble but note that if you intend to “nest” these tables in a way where you slide the smaller one out from the left or right (vs. from the front or back) you actually have to assemble it differently — you’ll need to get the smaller one under the bigger one completely assembled, and THEN put the final upper screws into the bigger one otherwise it won’t fit under from the “side approach”.  I learned this the hard way.