I use these in two of my machines, great cards.
Yes mii-tool is a nice utility, I had a LinkSys router that had a couple bad ports and would only connect at 10 Base-T FD even though they were 100 Base-T FD by design. A little static shock messed them up. But mii-tool saved the day by allowing me to change the speed of my card so it would connect at 10 instead of 100.