The only inconvenient : I will not pay anymore surcharge for specific alimentation food. For the record, I need lactose and diary free food, and I was charged 5% more (after negociation, at start it was 10%), because I was supposed to have "differents and specific meals for" me. I did have exactly the same things than the others. So I paid more, for same... I'm disapointed only about this point.
Next time I book a liveaboard with DiveBooker, I won't pay any charge for alimentation.