Linux + USB wavelan adapter headaches

Hi all,
For quite some time now I have been trying to get a stable setup with
a linux bpx (redhat 9 with kernel 2.4.22 (also tried 2.4.19) but it
seems to stay very buggy. I have 2 usb wavelan adapters here, one is a
sweex, the other is a SMC. What are experiences outthere in
networkland with linux usb wavelan adapters? Will it never be as
stable as a pci wavelan card? Are there people outthere who managed to
get a stable solution with the SMC USB adapter?

Alex