I think I found it difficult in the sense of its denseness in fact. Well, I find it hard to answer the “difficulty” question with much certainty; I'm equivocating. I don't love it all equally no, that's not the case. There are parts that I prefer immeasurably to others however, simply because I prefer I'm not sure whether that persuades me that it would be 'better' in some sense without them. I don't have the figures for specific chapters with me but I do know that Joyce added a lot to some of the later chapters - from Oxen of the Sun to Ithaca I think - meaning that the manuscript expanded in proof. I think you notice this as you read it, right?
If you're into stuff like this, you can read the full review.