I actually Love lftp I use it over all other clients....
one of the things I do really like about it you never get logged out with it, not even after days, I think it takes care of reauthenticating for you and everything if your server logs you out.
Lftp really does rock
A GUI would actually be welcome as well, as long as you had a nice degree of lftp functionality such as reverse mirroring and keeping you logged in and so
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