Well, I was recently flying with them and when deplaining the a/c I saw clearly liquid--presumably oil--leaking from the engine...
I did not really make me feel comfortable about them after all. Always keep in mind that a Low-Cost Carrier has to safe funds somewhere. I doubt that they keep the same high standards as i.e. BA! I might be wrong but it'd make sense, wouldn't it?
I've also heard about the practice of temporarily employing Polish F/Os for the sake of their much cheaper salaries--EURO2,000 a month! Dunno, but Ryanair don't appear too sympathetic to me. Then again, us rookies shall not to be too demanding as an airline job may be considered as winning the lottery these days...