Infrequent Ryanair Pax
As I am an infrequent FR passenger, i can’t say I’ve ever experienced any real issue with FR.
What I have paid for at time of booking has nearly always been exactly what I got from FR.
Occasional delays, the longest being 2 hours, is my worst experience.
Further occasional disagreements with gate staff about my bags, have seen my bags gate checked once, at no cost!
As as long as you are aware of what you should do most passengers will be fine.
As a passenger I am not a FR fan, but I use them as sometimes they really are the best option for me. While onboard I loathe the cheap tacky advertising and multiple announcements, wherein they are not that much different from my other recent carriers of choice, BA, Iberia and Aegean Air.