Bassi Hog's Back

@infmz covered it well but:

• Adjusting for pad wear is a pain
  
• Initial setup is a lot more fiddly than hydro brakes
  
• Modulation is generally poorer
  
• Truly good mechanical discs cost considerably more than excellent cheap hydros
  
  

FWIW, I rode with BB7s for 1,000's and 1,000's of KMs on several bikes. They were fine, and the additional maintenance they required was hardly onerous, but hydros are just so much better that I wouldn't consider mechanical brakes outside of very niche applications.

If you're after brakes that look a little different to Shimano, my colleague really rated these. They look quite nice in the flesh: https://www.bikeradar.com/reviews/components/brakes/disc-brake-systems/clarks-crs-4-brakes