They are as safe as any other form of airline.
In my (quite comprehensive) experience, both FR
offer excellent value-for-money, at least if you manage to get one of their cheaper fares.
Yes - never assume that low-cost carriers will always be cheaper than 'traditional' airlines, for they are not always. The key is to do an extensive search prior to booking.
Try to be as flexible as you possibly can, for the cheapest fares are almost always designed for the discerning, flexible passenger. Try to travel off-peak (i.e. very early morning, around mid-day or in the very late evening), on a Tuesday or Wednesday, and never during school holidays or other major holidays. Also, don't forget to book 4-6+ weeks in advance, although FR
frequently offers last-minute deals, which make it possible to get cheap seats a week before travel.
"Everyone writing for the Telegraph knows that the way to grab eyeballs is with Ryanair and/or sex."