I like Sylon, received my tokens fast and sheet was updated very soon. Managing bounty was very professional and I would join everytime again. I don't know about Hotachi or Hua_hui, maybe I will have a look.

I never joined AmaZix but I heard much very negative about it like scamming bounty participants for their rewards by not clearing the rules before and many participants never received tokens like normal. This a very shady ongoing, scamming bounty participants for their efforts. Many ICOs are enforcing this to save money