Update: I tried the Roomba 595 and it works, but doesn't clean as well as the original semi-working Neato. I saw Wal-mart had a deal where I could get a 3 year warranty on an XV-11 and I guess I'm kind of a glutton for punishment, so I pulled the trigger and decided to give them another try.
The XV-11 showed up today (batteries already plugged in, no stickers, which had me already expecting the worst). I wish I had good news, but it's 0-5. This unit won't even turn on. No lights, no sound, no error message, nothing. Tried using the old battery from #1 that Neato didn't want me to ship back and it still won't turn on. I don't think we can say this is old stock either as walmart.com has been selling out of these units routinely.
So, what are the odds on me going 0-6?