You can see their fee schedule at: http://www.ryanair.com/en/fees/ — yes, they charge a fee to even assign you a seat.

(Anecdote: I had a printed boarding pass all crumpled up at the bottom of my bag (they let you check in weeks before your flight, so it had to survive for a while) and my poorly kept pass was basically unreadable by their scanners. The baggage check rep printed a new boarding pass for free (without even asking, since she couldn't exactly scan my home printed and crumpled paper)).

Everyone does that now. Delta, BA, AA, Virgin, etc. I can think of very few airlines that give you free seat selection before check-in.

I don't agree with it, but it is the way things have gone for all airlines. Just like baggage fees on local flights (even though that causes mass delays during boarding since now everyone is trying to show too much into cramp overhead lockers).

That's not an extra, that a "you should have printed the PDF at home" charge.

Just remember that with Ryanair, simple is not an option unless you pay and pay and pay and pay.

Example: Printing boarding passes a few days ahead: not possible. Oh, unless you pay for reserved seats. Otherwise feel free to wait until a few days ahead of departure, remember to check in, or you'll be hit with another charge at checkin.

Source: Traveled w/Ryanair this summer with my family. The whole process was so annoying that I made it a priority not to give them a single € extra, even if that meant spending more than an hour at a slow internet café somewhere to print boarding passes for our flight home.

I've flown with Ryanair plenty of times and, if you are able to ignore the constant bugging with booze/parfums/car rentals onboard and can stand the small seats, they are the probably the best thing that there is.

In any case, I take Aer Lingus for flights between London and Dublin now. They're not considerably more expensive, but they are 100x better, and I don't feel like I'm giving money to a shower of utter bastards.