I did last Sunday, from a dedicated terminal at Deauville. Absolutely no problems, except that I forgot to change the language to English, and by the time I realised that this is an option I had done too much to start again. It looks like a great system, and something similar would be very welcome in the UK.
Does anyone know if you can use Olivia to file flight plans that don't originate OR end in France - i.e. within the UK FIR?