The construction is done in a few minutes, depending on what you do, either mount or screw. The holes for screwing are prefabricated in the suspension.
The manufacturer has enclosed the suspensions for the two most common door rebate-sizes 2 and 4 cm.
Some small things could be improved, what I would have put it a few euros. The distance between the lower shelf and the hook is sinnfrei, here would have a storage basket in part.
The storage baskets per se would be slightly higher, so you can also put it back eg shampoo or shower gel bottles and not only put.
Otherwise, a good product that we can recommend.