I had good luck using acx111 drivers (originally from SourceForge, I believe). Got them from links at House of Craig, at
http://www.houseofcraig.net/indx.php . The instructions there were great.
Now, to be fair, I didn't use ndiswrapper, so I really can't compare. But I can tell you that the drivers worked and let me use WEP encoding, and his instructions made troubleshooting pretty tractable.