A little over three years ago I decided to drop HBO and spend that money on Netflix, and I have never regretted it. I have three at a time/unlimited, and usually keep two discs of a TV series on hand and one movie. I have had two cracked discs in all that time, no big deal. There have only been a couple of times a disc has taken an extra day.
I have seen all kinds of documentaries and foreign films that would otherwise have been pretty hard to find. I'm very satisfied with Netflix.