We have used guides (or in one case he was more of a just a driver who drove us anywhere WE asked to go) from H. Stern as well as Saban jewelers. We have also bought jewelry from both on our own will. We have never encountered a hard sell from either company. We played poker on board and became friends with Gabe Hazan and his father, owners of Saban. We consider them friends and they've even visited us at our SoCa home without any mention of buying jewelry. I know many who have used the jewelers on board as guides/drivers and never purchased anything. If you have no intention or desire to look at jewelry, just say so firmly. We have never had a bad experience with any of the jewelers on board.
Can't speak about the luggage...we have never disembarked in Rio before so Grand Prix disembarkation will be our first.