Thanks for the compliment! Actually, although I have toured both ships, I am not 100% certain whether the balconies on Grand Princess are "see-through." Explorer's are. That should not be your only consideration, however. Seriously, check with your travel agent about which ship is best for you. If you don't have one, ask friends/acquaintances who they have been happy with, or feel free to email me (email@example.com.) Happy cruising!