The only assembly instructions provided were in Japanese. I contacted Wayfair and they then contacted the manufacturer, only to find out (after a week) that they don't have instructions in English! I was able to assemble the lower shelf, but couldn't figure out the top shelf. Ultimately had to take it apart, pack it all up and return it in a random box. Fortunately, Wayfair said they'd still issue a full refund (hope that's true!)... UPDATE: refunded in full. :-)

This two-tier pull-out shelf unit, along with it's three-tier shelf sibling have turned the chaos under my vanity sink, into organized heaven. they sit on each side of the plumbing and keep those things that need to be kept readily accessible right there. These and a caddy in front of the pipes makes everything so much easier.

How many screws? Why are they different sizes? Did I make a mistake purchasing it? Nope! It was easy to put together.

Easy assembly & install. Perfect for my needs. Great addition to other pieces from this company.

Assembly was a bit fiddly, but it wasn't hard. I thought adjusting the top shelf would be more streamlined, but if you ever want to change it you will have to unscrew it and reattach it. I bought the black shelf and it's a bit hard to see where you're screwing into because one set of screws you are putting through a hole into a pocket so it's a dark screw in complete shadow inside a black part.