I have used 100's of these Maxell discs (both the '+' and '-' vaieties) and have never had a dud one. Well apart from the time my PC decided to shut itself off in the middle of writing, but that's hardly the discs fault!! That one became a nice shiny coaster for my beer. Meaning that it was recycled and therefore environmentally friendly too. So, good value, reliable and nice to trees. What more could you ask for in a blank DVD disc!!!
Just be careful that you buy the correct format disc. I have a laptop which I bought in 2001 that has a DVD-Rom drive. As this is a read-only drive I didn't think it would matter if the discs were '-R' or '+R' once they had been written/burnt, they would just be read-only and therefore DVD-Rom. Nothing with my laptop said certain disc types wouldn't work so never thought anything of it. I burnt several '+R' discs worth of data which I intended to use on my laptop, but when I inserted them it didn't even recognise that a disc had been inserted so I couldn't use them. However '-R' discs work just fine on my laptop!!! So to cut a long and tedious story short my advice is to make sure you buy the correct discs or you will end up with a lot of shiny beer coasters!!