How secure is PayPass?

Has anybody using the new tech PayPass?
If so, please write me how easy or difficult it would be and if there is any security problem with it.
Thanks
n.b. - I watched Google Wallet in order to found out more.
If so, please write me how easy or difficult it would be and if there is any security problem with it.
Thanks
n.b. - I watched Google Wallet in order to found out more.
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