As a former engineer I always appreciate the design of IKEA products. IKEA assembly is almost always a breeze and everything lines up well. Parts are all included without missing any hardware.
The screw holes align well when joining two distinct parts of the furniture. I actually enjoy assembling IKEA furniture. Even the included tools are well thought out.
Another cool thing about IKEA products is they are easy to hack and there are numerous detailed plans available. A good example of this is the website IKEA hackers