LoveFilm used to be great. But I watch a lot of films, and I think someone there has decided to put the brakes on my service. It is really slow now, and they often send the same disc twice. If I return a disc now on Tuesday, my next disc often doesn't arrive until the following Monday (!!!!).
I have complained by email and on the phone, but they just don't seem to care. They admit something is wrong, but "it's not likely to get any better".
I said if they couldn't improve their delivery, I'd have to cancel my subscription. They really didn't care.
So, if you are renting 2-3 discs per month, LoveFilm may be great, but not really a very good value. If you are renting 2-3 discs per week, they'll figure out how to slow you down and scr*w you.