Celebrity cruises - Behind the scenes

Hmmmm, it's not often you'll hear me criticising Celebrity Cruises. I think they're a great cruise line with some of the most amazing ships at sea, (click here to see my review of the Celebrity Eclipse).
The one thing that does bug me about them however is the amount of things you're charged for whilst your onboard and the cost of those things in general.
If you're not careful you can walk away from your cruise with a huge bill on your onboard account and I don't think Celebritys latest brain wave is going to help this situation much.