Hello Patbud, I'll echo everything Penny said; Sea Princess is my favorite Princess ship; I love them all, but given a choice, I'll take Sea Princess.
C717 is an ideal cabin. You have passenger cabins above and below you, and you are close to the elevators and stairs. And you are only two decks above the Promenade deck, with the lounges, show rooms and open deck.
Have a wonderful cruise.