It's compatible with Oyster card readers which, I assume, means you will have to keep your Oyster card and Smartcard apart when touching tge Oyster card readers as you could end up being charged incorrectly.
No-one obviously there at 0745 except for a PCSO handing out leaflets on preventing burglaries when I used it for the 0757. I expected to see someone but it looked as much as I might have expected, that is nothing. But perhaps they were on a tour of the stations and arrived on the next train.
Good job the machines did go live this morning as queues for the ticket office & machines were huge as I arrived for the 7.27. Did attempt to queue as wanted to use some 'Delay Repay' vouchers but gave up as still not served after 10 minutes of queuing and train about to depart!