The guys at CD Freaks have put together a review of Plextor's first Blu-ray Disc writer, the PX-B900A. Here's what they had to say:
Belonging to the first generation of Blu-ray writers, the device seems to operate very good on most supported media types.

As the drive is RoHS (Restriction of Hazardous Substances Directive) Compliant, means it should be "Lead-, Mercury- and Cadmium-free" and an environment friendly product.
If you'd like to read more, CD Freaks' entire review can be found here.