Nscan Kiosks

We have a volunteer usher base and would like to get the scanners possibly out of  their hands. We have found it is hard to train a 1,000+ individuals that may only hold the device a few times a year.   I was wondering if anybody is using some type of scanning kiosks? If so...

--What model?

--Any issues running Nscan?

--Improvements moving people through the doors?

--Anything else that you may like to add.