I've had Netflix for two years now and I really enjoy it. I only have two complaints: 1)sometimes the disc is scratched or broken and won't play(they usually send you another one immediately thereafter) and 2) there is sometimes a very long wait on discs and you're better off going to the video store and renting them there. But otherwise, I've enjoyed netflix. I have the unlimited plan which is around $30 a month or so and it's very much worth the expense as I can rent as many movies as I want.
I'm actually quite amazed at how fast they do get here once they are in our Queue.