There have been some major shuffles in the Princess schedule in 2018.

Working on updating and validating the spreadsheet.

Lots of changes in Ruby, Star and Emerald schedule.

I would like to try a long cruise like that; but we have two dogs and an African Gray and I just wouldn't feel right boarding them for that long.  We've got a 17 day coming up in January and that's about the extent of our comfort level.

60 Days ! No way. I max out at around 28-30 after gaining to much weight.
I need a breather in between trips. 

Any reason for taking two 5 day B2B trips?

Any one here on these cruises?

Have just booked 5 day back to back on the Crown Princess leaving Port Everglades on Nov 8

"Princess Cruises has altered an upcoming 15-night itinerary for Caribbean Princess due to propulsion issue which is causing the vessel to sail at reduced speed."

https://www.cruisehive.com/princess-cruises-changes-future-ship-itinerary-due-reduced-speed/17429

Agreed. We did a B2B2B on the Ruby in 2015 and the wasted day in FLL was too much for us.

Well, that makes a lot of sense to me.  I've only done one B2B and it was really a combination of two itineraries--a Panama Canal, Ft. Lauderdale to Acapulco and a Mexican Riviera, Acapulco to L.A., eighteen days total on Sea Princess in 2000.

We always do B2B2B....cruises but doing it on a ship that only does 7 day trips means spending another day or two in Ft Lauderdale which to us is a complete waste of a cruise day doing nothing but waiting around for new passengers.