Don't know if this is a smokin deal but it seems OK depending on the quality of these and whether they'll burn faster then rated with your burner. I just got a 811 and I'm sitting here trying to decide if it's worth a gamble that they will.
Some reports I've read say they are Ritek and can burn at 8x with the Plex 708. Others are CMC and aren't much good at any speed

If anyone tries these post your results somewhere.