For being cheap media, suprisingly respectable, at least in my burners. The +R discs are AML002 and the results are very similar to the -R discs. If you are burning something really important, you may want to use something with a known track record, but so far they've done well for me.
If your burner is a crappy and has poor firmware support, they probably won't burn as nicely, but if you have a Benq or a NEC, you'll likely get very similar results. I've seen other burners that burn them similar to mine, but some don't do as good of a job, such as BTC drives (which are not very good drives). I've burned alot of the +Rs and a few of the -Rs and none have deteriorated so far, although even the oldest AML002 discs are only about 8-10 months old.
Playo -R UME01, 8x in Benq 1640, SB off:
Playo -R UME01, 8x in Liteon 160P6S, HT/SB/OS off: