My experience with installing USB serial drivers and having them stay mapped to a particular comm port is more like hoops with flames.
Whereas using the Zadig utility is a one time event you never have to repeat again. I just don't see the validity in the comparison.
I'm not trying to be difficult, nor say anything disparaging about BFGMiner, but CGMiner setup is not as problematic as many have MADE it out to be.
One caveat in my experience, the Block Erupters are my first USB mining devices so I had no baggage from previous installs/configurations.
Sam
The zadig utility was not consistent for me. I had to run it many times as I added/changed miners. After a couple dozen chips it finally seemed to keep the settings around and I stopped needing it. And with bfgminer, they don't need to stay on a particular com port (just run -S all).
Both work well, I just had more consistent results with bfgminer from an early stage, whereas cgminer mixed with moving the hubs/chips around a lot was not a smooth experience initially.