Read the reviews before I decided on this one - complaints involved instructions and \"tiny\" screws that were hard to handle. Instructions could have been more detailed, but really, assembly was very simple and could have been figured out from just a few pictures. The screws are metric-5; not really \"tiny\", just very short. They're easy to handle if you use a short Phillips-head screwdriver so you can hold the screw with the same hand holding the tool (see photo). Assembly only took a few minutes. Screws are included for anchoring the unit to the cabinet bottom, but I've chosen not to do that, at least for now. In addition to carefully measuring your available space, I recommend you also measure the stuff you plan to store on the organizer. I measure usable height of bottom drawer at 9.5-inches, top depends on your cabinet height. My spray bottles are all between 10 and 11 inches; they have to wait for the single-tier organizer to arrive.