Many Irish people will happily give you the shirt off their back, but others would much prefer sue you for it (especially if there’s a disputed family will in the mix somewhere). Usually the Irish are genuinely friendly, but like anywhere a lot depends on who you are, where you are and what you are.
Quibbling aside, the land of a hundred, thousand welcomes deserves its reputation because the truth is that most Irish people can be so kind and considerate it will take your breath away. But like anywhere, a few nettles sprout among all the roses, so tread carefully betimes.