An earlier reviewer called this a period piece, and I think that's exactly the right spirit needed to enjoy the film.
For those of us too young to remember 1969, this is a rather remarkable time capsule of values and social relationships. Most striking is the sense that the film seems to have been made by young people with really no idea of how older people live their lives. That wouldn't be a great problem, except that the film itself takes the generation gap as its central feature: how an older man living a boring, empty, unfulfilling life glimpses (but cannot participate in) the colorful, uninhibited, sensual lives of younger people.
On the other hand, while the film is clearly enamored with the hip glamor of youth and beauty, it also suggests that young people bridge the gender gap principally to have sex with each other. Otherwise, they don't have much to say. Strange! I remember getting that same sense from The Graduate (not to compare the two).
Anyway, I think the dvd is recommendable. Good picture, good music (of course), very good extras, and an interesting snapshot of a time and place.