I loved this shelf. It wasn't the easiest thing to install but once up, it looked great and fit our space perfectly.  Unfortunately, less than a month after owning it I noticed that the middle shelf had bent over time and is no longer straight. The top shelf also now tilts down on the left and is no longer parallel to the other two shelves.  I wish I could blame that we were weighing it down with anything exciting, but we've only had two books and one figurine on the shelf.  Our home has average humidity and there's no other reason we can think of that would have caused the shelves to start to warp. 
We would have returned it but covid happened and everything came to a standstill. Now it's too late to return which is very frustrating.