Every 16 liters of fuel is a gift, if you do not use the cumulative discount keychain from A-100, then you get a discount on the accumulated points, and you pay for all 16 liters of fuel!
Be careful! There is no such information at the gas station or in small print somewhere. But in big letters "EVERY 16 LITERS AS A GIFT"!!
And the keychain means you can throw it away
I try to refuel here when there is a special offer. There are almost no queues. But there are often problems with payment. Today, for example, both devices refused to accept card payments. Communication error, period. Unpleasant.
There's always some kind of jambs with the terminal, sometimes it doesn't read the keychain, sometimes it doesn't read the card.
As it is, this is usually where I refuel, conveniently and quickly. And there have never been any questions about fuel.