Well I've only ever had the 2 at a time unlimited plan, and while on the trial I got amazing turnaround. Once I was registered though, it turned into a 3 day affair. 1st day it's sent, 2nd day is wait, 3rd day it's sent back to me and I get it.
Only twice has there been an incident of me not getting a DVD(they said they sent it, so I guess it was lost in the mail). I have my account set up to email me when they recieve and mail out my DVDs. So I know exactly when I should expect something, which makes something wrong that much more noticeable.
I've never recieved a broken or scratched DVD, and I've only once had ot get something from another plant.. (It was either Karas or Blame), and even then it wasn't delayed that much.
I get both my DVDs at the same time, and I send them back in the same package so they don't receive one before the other.
The only problem I have with them at this point (Which really isn't a problem since I don't actually watch the DVDs upon receiving any more) is they don't send series discs in order.
They used to, don't get me wrong. But somewhere down the line, "add entire series" meant "We'll ship you whatever disc we can whenever we can" instead of "We'll ship them in order starting with disc 1."
Also Netflix seems to be slow on the uptake of new DVDs. Last time I checked they still didn't have the last DVD of Genshiken, and only discs 1 and 2 of Air Gear (Great series btw, glad to have seen som AMVs of it at AWA).
I've been with Netflix for a year now, and it honestly hasn't given me enough trouble for me to switch to some other company. -shrug-