We had the plus package on 2 of our last 3 cruises. They were priced at $40 each and at that price, we broke even or close to it. It was very nice to have, not thinking about the cost of the beverage, just ordering what we felt like. We really enjoyed it.
However, at $50 each it is not the same value for us. I may break even but my DW will only have several cokes and doesn't come close.
On our 12 days cruise earlier this month, we did NOT have the package. While it would have been nice to have a drink occasionally, we did just fine with the complimentary drinks and tap water. It is interesting to note that without the package, we did not purchase a single drink. We brought our soft drinks on board. So Princess lost revenue due to their price increase. We booked a new 7 day cruise on board and did not purchase the Plus package as we didn't think we would get our value from it, especially with all the port days. While I think the package is great, we likely will not purchase it again at the current price.