Hi,
I got mine last week (F82357B) and it's a really nice piece of hardware.
It is fully compliant with the genuine Agilent model (fully usable under Agilent IO library 16.0) and if you choose the mode "enable agilent GPIB cards for 488 programms" inside the Agilent software you can also use the nice software tools from John Miles ( KE5FX) and emulate a HP7470 plotter to import your instrument screen dislay.
I successfully used the F82357B with all my Agilent/HP devices (8712B, 8594E, 8591A, 437B .................)
I previously used a Prologix from my job and I found this one really more powerfull and compatible (Agilent, NI, KE5FX ...)
If this can help you ...
PS: the F model (versus the S ) is only a plus for people who whish to transfer a large amounts of datas.