If finishes and gaps are tight, all around bodies and across examples, the build quality is GOOD. If every units looked slightly different and some were outright broken straight out of the box, then the build quality is BAD. Even if they were worthy of included in the MoMA collection.
Both Microsoft and Apple(or their paid Chinese outsources) are top notch. Every units looks the same and flats on the bodies are really flat. Industrial design and usability, like sharp corners and fugly aesthetics, are different issues entirely.