If you are technically gifted and a well-equipped toolbox has, then the structure is not a big problem. However, one expects actually in such a prefabricated kit with fewer "obstacles". Ultimately, the design is, however, and keeps its promises. With a little patience and effort when tightening the screws, it is also very stable.
To use the top row of the rack, you should still einrechnen some buffer in the indication of the amounts. Have not thought of, so it offers me only space for 8 bottles.