The flavors are rated on a scale from K to JJJJ.  Specifically, these are the ratings:
 
  1. K
  2. J
  3. JK
  4. JJ
  5. JJK
  6. JJJ
  7. JJJK
  8. JJJJ
where 1 is the lowest score, and 8 is the highest.

In particular, the faces do not represent my opinion on a visit by visit basis. I like ice cream, but there are limits!