User blog comment:Monkey.D.Me/If I were in his/her shoes/@comment-3075024-20111031202722/@comment-72.182.0.105-20111106003531

The reward Sanji got after enduring "Hell" for two years was fulfilling his dream of visiting Fishman Island, including being held by mermaids and seeing the mermaid princess with his own eye (since one was covered). Anyone with eyes could see that.