i've got the reg. "ultra" module along with a clean module for my rm50 head and i absolutely love it.i've tried almost all the other current modules except for the ultra-lead & ultra-xl.i dont really think it sounds like a recto-tone.to my ears,it's like randall's description-"extreme high gain-perfect for all types of metal",which i think it is.it'll do anything from dokken to exodus to death/doom metal.it's hard to describe,but it's not really a nu-metal type-tone,which is what i dont want...by far it's my favorite module for this type of music.it's got the low-mids growl thing going,unlike the xtc module,which has that upper midrange bite.my second fav module now is the lynch "mr scary".i'll probably buy it for my second hi-gain module,but i'll wait to see what the other lynch modules end up sounding like as they come out before i make my final decision.otherwise,the ultra is a very underrated & killer hi-gain module!!!