We were visiting Kevin Deal's home/store, and he popped the hood on his PrimaLuna and ASL amps for comparison. The PrimaLuna amp does have super-neat layout, but what's also impressive is the unusually thick gauge chassis, especially when compared to the tin-can feel of ASL amps.
Some amp builders believe "messy" wiring is actually better for sound quality, though, possibly b/c the random electromagnetic fields generated by messy, random wires tend to have less sonic signature.