My husband and I both used this last week at MSP with no problems at security on Blackberry Bold. Once I got to the gate, I did have a problem -- I clicked on the link that had been sent by email and it no longer was functioning, so the gate agent had to print a boarding pass.

I think this could be really useful in the no printer situation. My sister recently experienced that when her printer broke and lines for the kiosks the Saturday before Christmas were crazy. Will be back at MSP today and will use this again. It's not a lot of paper per person but it does add up!