We like this unit very much. It fits perfectly provides quite a bit of space and matches the location.1. Assembly is not difficult -we assembled it in less than two hours. When we unpacked so many small parts it looked like trouble, but assembly is actual simple and straightforward. This unit uses small screws for the back pieces, which is more secure. We did need a small-handled screwdriver to tighten some screws inside the pillars.2. Adjustable. The lower back support bar/brace that connects the two towers/pillars has three optional fittings -high, medium, or low on the back. The instructions don't mention that, but we needed to use the bottom one to make it fit--and we actually attached that bar AFTER we put the rest together and put the unit in place behind/around the toilet. (small screwdriver was necessary!).3. Overall we think it is very sturdy and all screws or latches are concealed. Very clean look -perfect for the BathroomThank you!