CDR-Zone put up a review on Verbatim 8x DVD+R Double Layer media:

So what did I think about this latest 8x DVD+R Double layer offering from Verbatim? Just like the 2.4x Double layer media I have reviewed a while back rated speed recordings where in place on all used recording devices. It is what I come to expect from Verbatim who really do seem to make every effort to get good support for their media. The increased speed to 8x cuts Double layer recording time almost in half on some writers and this now makes Double layer media more attractive to the end user. Infact the Plextor PX-755A nearly broke the 15 minute mark using its 10x recording strategy. The Plextor PX-755A is the first writer to offer such high Double layer recording speeds and judging by the quality and speed achieved, I'm sure it wont be long before other companies follow plextors lead. I'm eager to see how well the Verbatim 8x DVD+R Double layer media handles possible speeds of 12x in the future! That said not every writer managed the rated speed on both layers - this is not down to individual quality of media but a need to update the way these writing devices handle this new high speed Double Layer media.

One of the main drawbacks of early Double layer media was the amount of time it took to record at 2.4x which coupled with its high price compared to single layer DVD+/-R media made users weary of using it. This is no longer the case to such an extent and, although still very expensive in comparison to single layer media, the recording times are now more attractive to users who may not want to compress a video presentation or span a backup over 2 single layer discs. Playback was smooth in the tested playback devices and transfer tests using my Plextor PX-755A also produced very nice graphs at the maximum transfer speed of 8x for Double layer media.