Well....
. Don't expect legroom (if you're tall, pray)
. Don't expect free food (and food on board, when you pay, is overpriced)
. Don't expect to pay to go the lavatory (at least not yet)
. Don't expect to have to stay up all flight long (not yet)
Apart from that, planes are safe, FA's have always been nice to me (even more than air france, actually).
To sum it up, with ryanair, it's not about flying, it's about getting from point A to point B on time, safely. Quite simple, and usually cheaper than regular airlines whose intra european service is quite a shame.
And to me, despite all the discomfort, it still seems the most valuable way to fly when you compare the cost (it helps ease the pain about the legroom
)