I want to hate it because it seems so old fashioned, and I constantly search for alternatives, but I keep coming back, because no other font allows me to read dense text for hours at a time.
I have a printed copy of Knuth's "Digital Typography" on my desk (hardcover from 1999). The table of contents does not look too great, but the rest of the book is a piece of art in itself.
I guess this Knuth dude knows his stuff.