We've been working the 'mu-spot' too for over 7 years. It's the most-used comp in the room, but with the settings I end up using (pretty much the same as Jerry, Jay, etc - input between 12-1 o'clock) the needles are barely moving.
Ours has the T-bar and M/S mods, as well as red lights and knobs. stike
Never noticed any problems in the bass either...
Between it and the STC-8 we can tackle pretty much any compression needs, and the API 2500 that we recently added to the room is nice when a mix needs a bit of a spanking
Thor