I bought a round trip to Brussels and Hamburg as part of their £2 seat sale.
I travelled to Hamburg for the total price of £4.18 (£2 each way and £0.18 booking fee). I didn't add any extras. I was very happy on the flight out even though I didn't get a window seat. The plane wasn't full and I was able to move around to get an aisle seat with more space. The crew were nice and caring, typically selling everything from coffee to scratch cards, but still able to smile and look out for you. My flight the next day was good also, apart from being stuck next to two burly men, but I managed to move to an empty row to secure my favourite window seat. The crew were nice on this flight aswell, I did buy a coffee for £3 as expected as it costs a lot of money to make coffee in the air.
I would recommend joining Ryanair's email list for offers as otherwise I would of never gone to Hamburg, it's set me up for the hope of a return trip sometime in the future.
Together with my Hostel, this 48hour trip to Hamburg cost the the grand total........ of £19.43, well worth it!
I didn't travel to Brussels as it worked out too much travelling on the other end for too much cost.