Visited on June 10, did a short charge with Shell RFID. No issue.
The chargers have the blue skin now, probably for quite a while already, but I never visited again since 2014.
There are TWINT QR codes. One per connector, and it only works for that particular connector. On one hand, that's a good way to make sure you select the correct connector. On the other hand, if one of the QR is damaged, then you won't be able to use TWINT on that connector.
There is still absolutely no signage to tell you how to reach the chargers. You need to drive around the building clockwise. You are not allowed to enter from the backroad, but that's where you will then exit.
I had not really noticed before how the first station is not centered with the parking spaces. But thanks to the bollards and general spacing it should not be an issue accessing and pulling the cable even with a car charging on the left. That is, as long as the car on the left is correctly using the left cable and not the wrong one!