In my opinion, the Blu-Ray are going through the same problems that the recordable CD came out over 15 years ago, and then when the the recordable DVD(+/-) was released during the 1x days, around 2002, I believe?
When manufacturers first started producing these optical discs on a major scale (Where they cost around Â£1 a piece back then) the dyes used to produce the discs were still in it's nappies and haven't really formulated enough to actually become stable for the long term. Certainly some may still have a few good discs, but the paranoia that discs degrade over weeks/months was simply down to bad manufacturing and formula which wasn't quite perfect.
Not that the formula is fantastic obviously, but newer discs are expected to last far, far longer than the discs that came out when they first released. Take the humble CD-R - The formula has now developed enough to actually be a stable, reliable format. DVD's are simply playing catchup. Say what you like about CMC and Ritek, their dyes are now far more stable than they were years ago.
The same is happening, again, with Blu-Ray now; It simply hasn't being around long enough to certify how long these discs will last. I haven't got a Blu-Ray player, let alone recorder, but do a lot of intensive television recording on my cheap and cheerful DVD Vistron recorder., using Maxell (Using RitekF1 dye) discs and have had no serious problems with them. Only really one or two failures from the 100 I've used. Give or take
I advise stay away for several reasons. One of which is the sheer cost of Blu-Ray, with prices now falling to Â£1 a disc. Sure, that doesn't seem much, but over time, and doing lots of burning it does add up. How many people do you know have Blu-Ray players? The dye isn't stable enough, and the fact is for storing intense amounts of data a portable hard drive will (in theory certainly) outlive a Blu-Ray disc and economically they work out better value for money than a spindle of Blu-Ray.
Discs are dirt cheap now. You can get a CDs and DVDs for less than 10p a disc if you know where to look (Obviously not Taiyo Yuden or Verbatim ) and many people refused to upgrade to Blu-Ray because there isn't any point shelling out for all new High Definition when a DVD is good enough. Films are more expensive than DVD, and for many of us the picture quality and extra sound quality are simply not enough to tempt us into Blu-Ray.
Until Blu-Ray recorders and discs come competative with DVD recorders and discs, their ain't a prayer I'm moving onto Blu-Ray. The market is in downloadable films, and I've ONLY just moved onto DVD myself! (Bought recorder last year).
In short - Stay far, far away from Blu-Ray.