Magnavox MDV453S Progressive-Scan DVD Player
Technically not a DVD player
This player did play DVD-R, -RW, and +RW (I didn't have a +R to try), but not well.  It kept dropping frames (that is, the video would pause and then skip forward), which is generally a symptom of an MPEG decoder that can't keep up with the bitrate of the DVD.  But the DVD was authored at 7.5Mbps max (average 5.5Mbps), and the DVD Forum standards specify that a DVD player must handle 9.8Mbps.  This might not matter for most commercial DVDs, which (I've heard) tend to stay below about 5Mbps in order to coddle older players; but there are plenty of titles coming out these days that go for high bitrates to provide maximum quality.  If this player can't handle them, then, technically, it is not a DVD player; it should not be advertised as such, and is probably not entitled to use the DVD Forum's DVD Video logo.<br />Of course, it's possible that the encoder I used to author my DVD was flawed; but it seems unlikely--all three of these discs played correctly in my AMW S99.