I'm like many others here, I've used Ryanair before and had no hassles but I've also been absolutely stitched up by them cancelling flights and making life difficult. Would I book a long way ahead trusting them to still be on the route? Absolutely not. If I have another choice that is broadly similar in price, would I pay the extra or go for the cheapest? If its close I'll take the other airline every time.
I'm sure there are hundreds like me. Factor in the new Ryanair hand luggage policy and its rare to get a cheap seat in reality. I will use Ryanair, but only as an airline of last resort. Having said all that I'm still surprised they're effectively binning STN, who is going to book a flight that only operates 2 days per week though? Very strange, you would have thought they would simply pull the plug completely.