Flew to Spain this summer from Italy via France. Stopped at Valencia, Seville, Madrid QuantroVientos, Bilbao.
As already said on the thread, landing fees were never more than 10 euro at any airport.
No custom issues anywhere.
We paid handling fees at Valencia (GA terminal is to the right of the main terminal airport side, nearish the refuelling pumps) because we were parked on the far side of the runway and used the airport minibus - 4 trips, we were 5 aeroplanes.
Valencia is very busy, we were kept on hold for 40 minutes before take off clearence
Flight plans were filed via computer at the terminals, staff every where were all very helpful and friendly.
ATC was straightforward and simple.
Seville was the only place in my flying experience in Europe where they came and checked my license and medical.
Paying cash for fuel entailed paperwork.
The scenery was great, the flying easy and the experience was wonderful.
AE