Would you use a mobile phone/PDA check-in service to get your boarding card (err, image allowing you to board and pass security)?
Pros
Saves paper Nothing to lose (well the phone/PDA maybe)No need to reprint after airport changes
Cons
No paper proof Harder when interlining
Pros
Saves paper Nothing to lose (well the phone/PDA maybe)No need to reprint after airport changes
Cons
No paper proof Harder when interlining