We just did our first concierge cruise on the Dream two weeks ago. There were no suggested amounts, just a section as part of the other gratuities charged to your account, only this was for your concierge team. The slip indicated an amount to be put on your ship board account according to number of people, including children, times the number of days to be added to your ship board account- just as other gratuities. We pre-paid all our other gratuities, so except for extra cash we add to the envelopes for exceptional service, we chose to tip our team in cash. There were envelopes for this on the desk in the lounge. We tipped according to our pocketbook and if we had used the team and had a big list of requests. We also tipped the bartender in the lounge and the server, in cash. So, since I had never done concierge before, I don't know if it is just as confusing- we just did the best we could and what we could afford. We felt they do deserve something, the service is very good.