If they are going for something like, say, a super-media disc (I'd bet a full anime series or a complete TV series season fits in that) I'd say, go!

But for backup... I still trust DAT tapes over any spinning media. Anything that spins will scratch, eventually. Damn, my dad's college work is stored in a tape reel that's older than *me*, yet I was able to get someone to read it!

However, about 1/3 of my CD's have gone to hell, taking away lots of important information. I have since stopped doing CD or DVD "backups", and using external HDs. I also did some DAT backups at my previous job (a friend sold me some DDS-2 cartridges) but I no longer have a DAT unit. Too bad...