The MMS series is a new directive in which I am hoping to cater to those who don't know, care, or want to learn or otherwise involve themselves with mic choice and mic placement. Much info can be had regarding the MMS features on the Speaker Cabinets overview page. Info on the update to the NEB library, as well as a bunch of other reading material can be found on that release announcement as well.
Really, REALLY colored (big push in the mids). Could actually see this being tweaked to be used as a special effect, on even non guitar related duties, as this power section really transforms the sound from the original source material IMHO.