I've used Netflix for about 2 years. It has been great up until the last 3 months. I keep a large que but I am finding frequent waits for more and more movies. Not necessarily current releases or movies you would normally consider very popular. I even sent in a comment sbout this to Netflix. Not much of a response though. Still beats going to BlockBuster, which I absolutely refuse to do. Albertson's has some great bargins ($0.99 on Mondays) but inventory is minimal.
Just watch out for scratched DVDs. I tried to watch Payback ... twice, with no luck. The sent me a disc that wouldn't play past the first couple chapters. The replacement they sent wouldn't play the final half hour.
Also, if you plan on watching series on seperate DVDs, spread them out in your queue. If it comes time for disc 1 of the set and it's not available, they'll send disc 2 (if it's the next one in the queue) and you'll be stuck holding onto that disc until you get disc 1. I don't know why they can't just add a function to their queue software for series ordering.