The DVD-RW and DVD+RW formats are both good for making DVD movies but are
essentially engaged in a Beta versus VHS-type battle. The consumer market
will ultimately determine which format wins or they end up combining into a
single standard, but it is important to understand that neither is yet a
universal standard. Another thing to note is that many DVD players won't
play any kind of rewritable disk. Most of the newer players will play these
kinds of disks, but if you have an older DVD player it may not. In general,
the newer your DVD player, the more likely it is to play all the recordable
formats. There are web sites like Apple.com, HomeMovie.com and DVDplusRW.org
that list compatible players and formats, but these are not unabridged
resources either. Use them as a general guide.