I just got this a week ago! Untitled by D Y, on Flickr FYI, there's three versions.. the original (old) big box C.A.B... then the CabM... then the CabM+ The old firmare of CabM only had Power Amp simulation and Cab Sims.. so you have to have some sort of preamp pedal to use with it.. then the firmware got an upgrade, which included a 74 Silverface Bassman preamp.. still has power amp emulation and cab sims.. The CabM can be upgrade to the CabM+ software.. however, the speaker cabinets that came with the CabM+ hardware won't be downloaded into it.. I think the license for both hardwares are different.. anyway, Tested this one in church last Sunday, and was blown away with it.. of course there's something missing as I've taken the amp out of the equation, but it sounded pretty good.. WITH TWEAKING.. some presets were all over the top.. so I just chose a few, deleted everything else and tweaked the eq, mics and mic placements.. sounded good to my ears.. Untitled by D Y, on Flickr It got decent headroom.. I mean, I'm using tube overdrives and it renders it clearly.. I'm not even 3/4's of the way of my input signal.. but this is some sort of a stop-gap for me, I'm going direct to PA while I'm on queue for an 80w High Powered Tweed Twin to use in church.. I'll use the tube amp, then a reactive load, and use the CabM+ for the cab sims and speaker IR's.. thats my solution to still using a tube amp and still go direct/silent stage. Hehehe I'm waiting for our recording to hear how it is in the PA Board Mix.. I'm suspecting that the board mix will also be different through the PA House speakers.. but oh well.. at least some of my friends told me I sounded good through the speakers..