No, that method of burning important data (packet writing) to rewritable CD/DVD media is not recommended, especially as blank "write once" media is now much cheaper than it used to be.
Packet writing is probably the least reliable method of burning files to disc as the data can easily become corrupted, which is what happened to me several years ago before Nero removed their "inCD" packet-writing feature.. I got wise & stopped using that method. Nero evidently didn't have much faith in it either after much negative feedback, which is why they dropped it.
For short-term storage it's okay (eg transferring a lot of data between two computers) and indeed it is quick & convenient, but that's all you should use it for.
I don't even buy rewritable media anymore, I only ever buy CD-R & DVD-R discs and burn data to them using commercial burning software (Nero).