Ok.. I've only just seen this thread and have only read a couple of the pages, as there's no way i'm trawling through 36.
Anyway, I'm a Lovefilm member, have been for ages.. I can't remember how long.. and I still think they are great!
I've ALWAYS received my dvRAB 2 working days after sending them back, and I've found their customer service section, over email at least (as that's all i've used) to be very helpful.
I did have a problem a few months back where I got rather angry over receiving disc 3 of a series before disc 2..and something to do with wanting a film to watch for the weekend.. I got a reply the same day explaining that the system they have in place for series isn't very good and it would soon be improved. He advised me to only add one disc of a series at a time to my list, which I now do, and this works great. He also apologised and offered to send me out an extra disc to compensate. I replied that evening and they sent me a disc out the next day, which I received the day after.
In other instances i've always found them to be very good too and I jus tlike the whole service. I don't know why i've never experienced delays where other people have but I guess if I did get them i'd be annoyed too.