Crutchfield Customer Review (What's this?)
Have used these discs for years with Panasonic DVRs. They allow recording in an erasable/re-recordable form and don't require finalizing the disc (so you can add or erase or edit material on the fly later). In addition, they are highly dependable, as opposed to the record/check/trash and start-over process associated with many DVD+R or DVD-R discs. They're a bit pricey, but when performance--including reliability--is the top requirement, they're the discs I use.
Pros: Reliability, random access.