One has to realize that with Ryanair the conditions and pay never go up. Management might claim and say they are. And even ventilate this in the media, but they simply aren't. As time goes on you will always have less money in your pocket to spend and deteriorating conditions. It has always been like that at least the last decade.
You might get or have a 5/4 roster now, but that for sure isn't guaranteed and might be changed tomorrow if the company wants. Thats it might be in your contract doesn't matter. The contract is for you to have to stick to and for them to change and do with as they like, when they like. In many contracts the small print already talks about a possible variable roster in the summer and the company surely wants to go to unpaid leave in the winter. Ryanair's intentions and future are and were always in the small print.
And for the base you have or will get for now is also nothing certain. They can change that when they like and to where they like with collaterally possibly your pay reducing then as well as your new base might, and most likely will, have a lower salary for your position as you had before! The pressure of uncertainty is uncomfortable and most of the time sooner or later an unwanted change will appear on your doorstep.
And why people get bases they want or possibly get a fair deal when they join now? Because Ryanair is short of pilots! But as soon as they have enough again and/or pilots have no other place to really go to they will show their real face again and you might find yourself at the sharp end of their blade and regret your choice for Ryanair.
Be careful if you want to go into this lion's lair and realize what you get yourself into. What appears to be ok now, might turn ugly quickly sooner or later! It often does with Ryanair, one way or the other and your conditions and/or pay will go down.
Thing to also think of is what does the competition offer and what is the lesser of two evils for you.
This is all of course just my opinion.