Likes:
  1. Reusable
  2. Faster growth rate than soil
  3. More oxygen to root system than soil
  4. More precise control over nutes in substrate--there are none. Therefore there are no large build-ups. There is a small flush at every feeding allowing for little buildup over time.
  5. Can be mixed up with a ratio of perlite up to 50% without ill effect.
Dislikes:
  1. I use more nutes since I'm currently doing run-to-waste style.
  2. It's still a substrate, so it's still a little messy like soil.