Hi Chris,
Mark Clarkstone and I did alot of "work" on this unit.
It took some time to set it up and the manual is the worst!
But now that I have been using it and got the hold on the setup, its a really nice unit.
Im currently only using 2 of the tuners, but it works great.
Performance: I haven't had any problems.
$300 seems like alot, think i got mine for $180.
What is your current setup like?
Im working on a tutorial for the tss400 mkii and tvheadend (my setup), so ask away.
Kind regards
Pablo