I had signed up for the 4 week trial, and cancelled yesterday.
but it actually ends today 9/9. They accepted my cancellation without any problems, and I have until 9/19 to return whatever I have out. Further still I had sent a movie in that they recieved AFTER I had cancelled my account. But since my account does not officially end until today, they sent the next movie I had in my queue anyways. Pretty nice I thought compared to the others. I found the turnaround to be slightly faster than netflix (manhattan).
Once you cancel, they come back with a slightly better offer of 15.99/mo if you sign up for 6 months, so if your staying with it for a while- thats the way to go.