Zenith IQB36B44W 36" TV
PIP Failed, but otherwise
I ALSO had the PIP fail in my unit, in fact - it never worked out of the box.  Zenith service sent someone out, they had to haul it away for a few days (couldn't fix it onsite), and I got it back.  Worked fine ever since.  No other problems.  So, only that little annoyance, and I'll give it 4 out of 5.