Depends on your drive... I got about 40 or so e3works branded discs back about the end of 2003, I found the discs still play well over a good year after I burned them on my Liteon 411 (although I burned them at 2.4x rather than 4x, seemed to work with more DVD players). The same discs would probably burn nicely at 4x on my NEC ND-3500 burner (if I had any left I'd test for you) - they're probably better than Princo or AN31 or the really cheap types, but top quality they sure ain't (hence the cheap cheap ).