I purchased this item in April 2006, thinking that since it came from a reputable manufacturer like 3Com it would provide excellent performance. Unfortunately, it appears I was mistaken. My particular adapter has a tendency to drop WLAN and almost constantly reports a "Low" signal strength. This despite being located only one meter away from a pair of laptops that always report "Excellent" signal strength from my router. I've also attempted placing my WiFi-enabled mobile phone behind this adapter to see if it was the location that was causing the problem, but my phone also reports an excellent signal. The router is 10 meters away, passes through only one wall, and is using a channel that none of the other access points in the area appear to be using.
I have tried the various drivers on 3Com's website, except for the one dated 16 May, 2006, since that one is meant only for units with serial numbers starting with 0300/. The latest drivers are dated 22 April, 2005 and do not fix the issues mentioned earlier.