I mean the service, not the stock NFLX (I no longer kept up to date with its stock). I heard about Netflix couple years ago, but I just started to use its service recently. Some of the features I like about:
1) The queue: the customer could put up a movie queue. Once a movie is returned, the one on the top will be mailed.
2) Fast: here in STL it takes one day to ship. So if I return the movie on Mon, I will receive a new one on Wed. The design on reusable envelop is also impressive.