I am very handy and thought this would be no problem despite several reviews saying it was on the more difficult end to put together. 
You absolutely cannot just use a Phillips head screwdriver, you need a drill, I used just a Phillips head screwdriver to put together most of the first one (I got a set) and it took over 2 hours.
Also- anywhere screws are used only the top piece of wood had pilot holes drilled, the second piece never did, literally for any of them. This is also probably why they say no power tools - not having pilot holes makes it much more likely wood will split when it’s being drilled into.
It does like very nice when it’s all done!