I usually spend quite a while choosing between several possible itineraries before booking a cruise, so like I said I like to see it in black and white, rather than refer back to my notes made from a phone call. Especially as I know that Celebrity themselves do not always get it right first time. If I was just looking at one cruise I think a phone call would not be so bad.
My cruise last week, and my upcoming one, were both booked before AI, after being lifted and shifted a few times. I had the Classic Bev package and found I managed okay with just the Elite 90 minutes WiFi, so know I do not necessarily need that. Just the gratuities to add on.