I have it and it works good. The only problem I've ran into is that the ftp browser built in will hang if you type in an address that doesn't exist or if the ftp server you are talking to stops transmitting. There is already one security patch (for win2k at least) for ie6 on windows update.
The nice thing about ie6 is that you have a lot of options dealing with cookies (allow some sites to use them, and the rest can't.)