Gotta agree there.
RW media should only really be used as a temporary data or video storage solution.
Personally, I only tend to use my RW discs in my set-top DVD Recorder to record TV programmes. Once I've filled up one RW disc, I take it to my PC, rip it to the hard drive and make a copy of it onto a -R or a +R disc. Then erase everything that was on the RW disc and re-use it.
This is essentially what RW discs should be used for. :iagree:
To answer chrizio's question, for making a backup of a windows installation; I'd recommend that you use either -R or +R discs but only if you're burner can't deal with DVD-RAM.