The rack is excellent! Great directions, easy to build and attach to the wall. 
We tried a box without the lid before anchoring to wall and it was beautiful…until we anchored it to the wall and put the box WITH the lid in. It does not fit. I am sure if we undo it from the wall we could stretch it out and re-anchor it so it isn’t a total failure. Until then I am using them without the lids!

UPDATE There is no way to make this longer therefore the lids do not fit. The unit is great but the corresponding tubs you are led to believe fit did not in our case.