I like the part when he talks about "quality", or when Phaedrus talks about "quality". That quality is something everyone knows, but no one can really define. Although I think that statement only applies to certain fields and perhaps not others. For example, in my field of work, quality means tight and even joints, level and plum installation, straight lines, and even margins. Proportions matter too, overhangs are usually half inch or one inch depending on size of molding; reveals are usually quarter inch. I can go on and on, but you probably get the point.