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i'm so freaking confused about DVD - R and DVD + R. what's different between them?? i heard some say it depends on what ur dvd recorder use on. but some say "-" is less quality and "+" is more quality or other way around, i don't know. of course, i did ask the clerk in the store, but their explain even more confused to me. help me~!

Here, I hope this helps:

A previous DVD recordable format called DVD-RAM (DVD random access memory) predates DVD-R. Developed in 1996, DVD-RAM is a rewritable optical disc usually encased in a cartridge. Currently available in standard 4.7 GB (4.377 GiB), it is ideal for use that requires quick revisions and rewriting. In 2002 a new format was developed called DVD+R (or "plus" R). Created by a coalition called the DVD+RW Alliance, this format uses a number of improved technologies that, while generally unnoticeable to the end user, make a more reliable technology. One example is the ADIP (ADdress In Pregroove) system of tracking and speed control used by DVD+R being less susceptible to interference and error than the LPP (Land Pre Pit) system used by DVD-R, which makes the ADIP system more accurate at higher speeds. In addition, DVD+R(W) has a more robust error management system than DVD-R(W), allowing for more accurate burning to media independent of the quality of the media. Additional session linking methods are more accurate with DVD+R(W) versus DVD-R(W), resulting in fewer damaged or unusable discs due to buffer under-run and multi-session disks with fewer PI/PO errors.

This new format, among other things, resulted in DVD-R being unofficially referred to as DVD "minus" R (though in countries where British English is dominant, the term "minus R" was already common; not just in contrast to "plus R"). DVD-R and DVD+R technologies are not directly compatible, which created a format war in the DVD technology industry. To reconcile the two competing formats, manufacturers created hybrid drives that could read both – most hybrid drives that handle both formats are labeled DVD±R and Super Multi (which includes DVD-RAM support) and are very popular.
As of 2006, the market for recordable DVD technology shows little sign of settling down in favour of either the plus or dash formats, which is mostly the result of the increasing numbers of dual-format devices that can record to both formats; it has become very difficult to find new devices that can only record to one of the formats. However, because the DVD-R format has been in use since 1997, it has had a five-year lead on DVD+R. As such, older or cheaper DVD players (up to 2004 vintage) are more likely to favour the DVD-R standard exclusively, and when creating DVDs for distribution (where the playing unit is unknown or older) the DVD-R format would normally be preferable.

so simply say... just get Dash. got it. thanks, jaydub. lol

Only worry about -R

Everything else is to "specific" to the player/burner. -R You can be count on working on the biggest variety of players.

Hope that helps.

The difference is that -R is write once. You cannot use any extra/leftover space on the disc once you've written to it.

+R allows you to write to a disc in more than one session without having to finalize the formatting on the first session. Burn to the disc until it's full and then close it to be read in multiple players.

o, i didn't know that +R let u write more than 1 session til full. but the downside is that not many dvd players/recorders can read +R. i guess it's not ideal for business to record demo for their clients. thanks for the tip about multiple sessions on +R, jeffu. but i have decided to choose -R as a reliable disc.