We've booked lots of GTY rooms. We just really don't care where our room is, so we may as well save whatever we can. "Only" $15 per person is $30 that can go towards tips or buy a t-shirt, etc. We are typically inside room people, and a few times we've ended up in an oceanview. Once we ended up in an accessible aft verandah! Since we really don't care, it's fun to be surprised with what we end up with.