I first read Iberia in 1992, as I took my parents through three weeks in Spain. As mentioned earlier, the political insights are dated, but the descriptions of the places and people are timeless. I count this as one of my favorite volumes on Spain. It's a testament to Michener's skill in relating that the book is still relevant today.
I picked up my hardbound copy of Iberia at a second-hand bookstore for $2 US in mint condition.
Although a little ungainly in its portability, for the luggage traveler, we found it indispensable. We would read what Michener had to say prior to, or on the way to the place he was describing. It was great!