From what Iv seen it works pretty well at mainline. I'm sure we would double check the bag count/location. But how long does that take? 3 seconds? I mean, when the perf data comes back it will likely have tail# and flight#, people and bag count. It's just there for you already as seats are counted during boarding when tickets are scanned, and bags are uploaded the second they close the bin. What more do you need? Saves tons of time IMO. Now instead of waiting for the pax counts and bag counts, they are loaded up to the system and likely sent to us up front long before we would even have the paper copy in the first place.