Nice review ... I got the exact same writer ... it keeps reading HP 4X RW media as 2.4X max (even with firmware updated to 1.0b) ... apart from this no issues.
Had my drive's firmware updated to 1.0c also. It used to have a problem that it sometimes would not open. That seems to have been fixed. Apart from that, I don't notice anything else.
Recenty did not read a CD I wrote in 1998. The CD did not have a single scratch at the bottom. It failed with CRC validation errors. Guess I can estimate the life of my CDs now .
I don't use it for much DVD work. Just to read DVDs that I get from friends. I've moved to magnetic storage. Much faster, no disk changing and an external drive ensures backup of data in case my internal drive fails.