They have been surprisingly good for the price so far. Easily the best/most consistently decent among the bargain-brand discs I've tested with the WH10LS30. Of the 30+ burns I've done with them, error totals are a little higher than Verb/TDK/Falcon discs, but error max is not nearly high enough to create a problem with read-back/verification tests, unlike some other bargain BD-R's I've tried. I've been watching closely for signs of shoddy manufacturing like uneven dye coating or poor bonding(air bubbles at hub/rim) and I've seen nothing yet to give me concerns about their longevity. Cheap, very usable HTL's with none of the LTH compatibility concerns. Life is good :D.