I strongly recommend BFGMINER for USB Block Erupters.
BFGMiner may well be just fine.
But I cannot believe it is easier nor more reliable than CGMiner. The install was the easiest miner setup I have ever done, with any mining program including Ufasoft. I am running 3 instances to three pools 2 Erupters each. Maybe since I don't have a high number of devices I'm not seeing issues others may be having??
Mapping Erupters as serial ports has to be problematic as the serial port mappings will change at Windoze' whim on a reboot which would cause major problems with multiple instances of a miner.
Win7 32 bit
CGMiner 3.3.1
2 Rosewill USB 2.0 7 port hubs.
Sam
The problem is the -newest- cgminer requires more than just mapping them to COM ports. It uses WinUSB on top of the other tool that maps them. As a result it's fully hotpluggable, but adds an extra hoop and sometimes requires you to run an extra tool to re-assign WinUSB when you change ports/add more units. Meanwhile, bfgminer only uses the software that makes them show up as COM ports, and you run '-S all' to have it scan/recognize all of them at once.
Older cgminer verisons work the same as bfgminer as far as I'm aware, it's only the newest version that added extra steps (newest cgminer does not have -S at all).