Generally speaking, we've found the RSSC packages to be distinctly more expensive than doing the stuff on your own. For example, before our Baltics cruise on Voyager, our two nights at the Grand Hotel in Stockholm (the best hotel in Scandinavia), our taxi ride (vs. a "limo") from the airport, and our taxi to the ship ending up costing us about $1,200 less than the couple in the room next to ours, who booked the RSSC package, paid in total. They were not pleased with the difference, to say the least.
On the other hand, when we went on the PG, the RSSC package was better than we could have booked on our own.