We have just returned from a cruise with Grand Princess
were very excited to see the changes the refit had made,did not seem like much, when we first boarded but we were wrong what a difference the new Atrium has made Very user friendly plenty of place to sit and have a coffee or drink and a chat open and airy,very pleasant.
The Horizon had had an upgrade too had read some bad remarks about people flow etc but we found it much better. Managed to get a table each time shared a lot but no problems with that nice to chat to new folk.
balcony cabins on Calibre Deck are good plenty of room big balcony half in shade half in sun