I just upgraded from an ART SLA2 to the Matrix and I have to say I wasnt impressed at first seemed to need to push the treble up on my presets but after a little tweaking sounds fabulous. Main thing I notice it is warmer sound and the treble is not as harsh as the ART infact I use to tend to only use certain AXE amp models but now it opens up more amp models to me that are usable because the top end is not as harsh really smooths the top end less brittle I mean absolutely not brittle lol. One thing I really noticed I dont get ear fatigue from playing like I did before and it really impressed me at rehearsal last how well it cuts through the mix even when my volume was turned down I could hear notes so clearly. I had to chuckle because of the orange lights that eminate from inside it make it look like there are tubes in there. I didnt expect that I thought from the pics online they just added that effect for show LOL. Its a nice touch. I am really happy with my purchase.