The plant stands are beautiful! 
The assembly directions weren’t all that clear so make sure that you have the two straight posts on each stand facing the proper way up - there should be more space at the bottom before the holes for the screws start than at the top. I had to disassemble the first stand because I had it the wrong way. No notes in the instructions about that. Also, the directions say not to tighten the screws all of the way during assembly - Follow those instructions because there’s a lot of adjustments needed to make the shelves straight and level. If you’re going to use them together, set them next to each other while doing it to make sure the shelves line up and can be pressed together.