Cuba micro coil, 1.0 Ohm, 3.8v to 4.2v. I play with the setting every time I vape different juice. It is quite subjective thou for individual preferences.

Reasons juice don't taste good like the normal days,  or muted :

1. Wick - broken or burned --> need to change cotton
2. Coil - gunk --> dry burn or recoil new
3. Vaper tongue
  - change to different e-juices
  - drink lemon/coffee
  - drink more water
  - if some burn on your mouth/tongue... need 3-4 days to heal (especially when you vape at high temperature)

Most of the vapers only tell you 50% stories, i tell you 99%. Hehe