Equally good to Plextor PX-740 (factly: the same drive) and costing about half! So, it can't be a bad drive at all... I prefer NEC drives, but this is (partly) subjective.
Of course your BenQ can't utilize the fine program named Plextools, but PX-740 cannot fully utilize it, either (should we call it "not-a-real-Plextor"?).