Ryanair and Easyjet aren't anywhere near as bad as some people and tv shows make them out to be. I've flown with both airlines many times and found them to be very reliable although I think Ryanair is more punctual. As long as you are aware of the "rules" ( check in times, weight limit on luggage etc ) and you are adequately insured then everything should be fine.
I hope you had a great day out in Spain - it's a pity it was only for one day though!!