Imation is just a brand, brand means nothing.
Read up at
http://www.digitalfaq.com/reviews/dvd-media.htm
If CMC, the discs are crap.
If RITEKF1, then the discs are decent, although others are better.
Maxell = CMC = crap
Memorex = CMC = crap
Stop buying disc by the meaningless name branding.