PRO:  For a not very expensive pet barrier, it was about what I expected.  Two vertical bars, each with a long threaded rod to extend from the floor to ceiling.  There are two long oval loops that run horizontally.  Each of these loops expands to they can reach out to the interior walls of the vehicle.  I put it in the back of my 2001 Suburban, behind the 2nd seat.  It went in easier than I expected, after reading some of the other reviews.  The main part of the device looks fairly well made, though I don't see any way of securing the horizontal loops in their extended positions.