FR is ok if you travel with the understanding that it will be expensive (so many extra fees), you will be cramped, and you will be sold things incessantly. For some routes, however, it's worth paying what I call the FR premium in extra fees and discomfort in order to arrive much closer to one's destination.

I used to do this quite frequently when travelling to DNR, for example, as it was so much more convenient than flying to Paris and then taking a train. As long as one's expectations aren't too high, FR is usually fine.