The Avid Elixir brakes have increased stopping power over the Juicy 7 partly due the new caliper with a larger piston and pad combination. Additionally, the Elixir brakes have a top loading pad system that makes removal and installation a snap. The new features required a redesigned pad specific to the Elixir brake. The Avid Elixir disc brake pads have a steel backing and come in two options: Organic or Metallic. Organic pads are softer and will provide more quiet braking and increased modulation. Metallic pads will offer longer life and improved heat dissipation. We always recommend Metallic for riders who often ride in wet conditions. The Avid Elixir disc brake pads are sold as one pair of left and right to fit one caliper and include the retraction spring. Please note: These are Avid's factory XX brake pads, but you must use the organic compound as the metallic pads generate too much heat for the magnesium calipers.
Strengths: Metallic: excellent braking power! much more power than organic pads.
Weaknesses: none so far
this opinion is about the metallic pads. I have replaced the organic pads-aluminum back with these metallic pads-steal back. they are just excellent! I never felt so secure descending very rough trails. you have to apply little power on the lever to get a good stopping feeling. I can control my bike much better now with the metallic pads. Very quiet too!