We've only been in it for a month or so (too bad I missed the free month John!). I too, live near a DC so I have mailed a return from my own mailbox (which they pick up at about 3:00) and by 10:00 a.m. the next day I have an email saying it has been received and I get one within the next day or 2.
I find I'm watching more movies than I ever have because it's so easy and I can be lazy about returning them. I just wish I would have joined when I was pregnant and spending lots of time resting.
After the few movies I really want to see, I'm getting Homicide:Life on the Streets to watch. I miss that show.