Once, but not twice!
We saw the negative reviews before our departure, so we had some idea of what could happen. When we got to the 2D terminal of the CDG airport, we didn’t see our flight on display. We found out that it has moved to another terminal with no announcements!
So we had to take a train to terminal 3! It was very stressful; lucky that we arrived well in advance! No delays, honest flight. On the way back: we arrived at the Prague airport and don’t see the flight on display there!
We went to the airline’s counter, where they told us that the flight had been cancelled and would be replaced by another airline, Czech Airlines. Again with no announcements! The flight went well and it was clear that it was a more upmarket airline! So, Smart Wings made us really scared and gave us no warnings. Never again!