I don't like the way Kurzweil writes at all. I didn't really have trouble understanding any of his books that I've read (Age of Spiritual Machines, The Singularity is Near, and Fantastic Voyage), but I found them all to be tedious reads. Honestly, if you listen to a long-form interview with him, you'll probably get like 80%+ of what's in any of the books. What you'll miss out on is mostly his ideas around sex in the future, opinions that I could care less about.

That all said, if you want to make it through, the best thing you can probably do is to sit down and read it with an open web browser in front of you, and a notebook and pen beside you. It will take you quite a bit longer, but you start at Wikipedia with any term you don't understand, and keep working your way down with understanding until you don't care about the detail anymore. Writing stuff down will help you remember it and/or let you look up terms later, if you decide you'd rather just get the gist of any given section, first.