I use them quite often as I visit Eindhoven every few weeks and their timings mean I can have a long day but get a full day of work in. With BA I would have to fly the night before and train it. FR are fine for this, Speedy boarding, reserved seats and still very cheap most if the time. Also I am amazed how quick the flight from
EIN to STN is vs AMS to LHR by the time you take holding and taxing into account.