How It's Made/YMMV

Awesome Music: The background music that plays in the "Pipe Organs" segment is called "Variations on O Filii et Filiae, Op. 49, No. 2" by Alexandre Guilmant.
Broken Base: In the US, many will argue that Brooks Moore is the voice of the show and cannot stand the ninth and tenth seasons because of the different announcer and tenor to the show. Many were relieved when he came back and it went back to normal in season eleven. However a few aspects of those two seasons (including the announcer) ended up in the later sort-of-Spin-Off Factory Made.
Ear Worm: The short opening theme is incredibly catchy.
- The segments themselves have simple and repetitive Background Music that will be stuck in your head for a while.
Fun for Some: Especially when it comes to long marathons on the Discovery or Science Channels. That is if you haven't been soothed into a coma by episode five by all the pretty machines.
Nausea Fuel/Squick: The "Artificial Eyes" segment. The way it's being done is just... gag-and-barf-worthy.
Nightmare Fuel: The "hatchery chicks" segment. Oh, God! Scenes of little chicks getting hatched only to be tossed about in conveyor belts and machines... all to a tune of some happy/creepy music! Sure, they get better and all, but still...
- Alternately, you could've seen it as rather funny, the chicks trying to run away while the conveyor whisks them off to be packed. "No, I don't wanna go in the box!"
Replacement Scrappy: Inverted with Mark Tewksbury, the show's first host, who did absolutely nothing to fight the common stereotype that all athletes have very dull personalities and voices. Predictably, many people skip the parts where he introduces the show, and hate the fact that they're forced to listen to him drone on during the narration. Check the YouTube comments for the first episodes...
What Do You Mean It's for Kids?: In some episodes, ESPECIALLY the aforementioned "artificial eyes" and "hatchery chicks" segments.