I disagree - the REAL power of a Nexperia chipped drive is the level and accuracy of disc scanning detail it can provide - both to varying extents unparalelled in modern drives. I have also read here that a BenQ with BenQ firmware will burn CDs better than a BenQ with Philips firmware.
There is a good FAQ on the use of BQFlasher here somewhere, you need to have a stable machine that you can put into safe mode, and be reasonably assured of the power supply. Where I live, I can count on one hand the number of power interruptions we've had over the last 5 years and I imagine for most others it is similar.
I crossflashed a Plextor PX-740A to a BenQ DW1640 (and may further upflash it to an EW164B) and I can tell you that if you follow the BQFlasher instructions, your odds of bricking the drive are extremely low and the payoff is totally worth it.
About 6 months ago maybe closer to a year, a member named Parato Optimal IIRC, posted a spreadsheet detailing all the Nexperia BenQ drives and every OEM brandname each model had been rebadged under. I'll see if I can dig that up.