I don't care what anyone says, the guitar tones in this are absolutely FANTASTIC. I am a die hard kemper lover as most people know, but these guitar tones (atleast to me) kill 90 percent of the "free" profiles on the rig exchange, and I stand by that comment. Really love what this expansion has done for me. Also, between this and metal machine, my drums have never sounded better. While I am a noob at mixing drums, this definitely gets you in the ball park of what sounds REALLY good, and to go from there. I turned off all the EQ's in metal machine, applied some of the sneap drum presets on each channel (snare pop, kick 2 on the kick track) and a few other out of hte ordinary ideas (metal mix on the entire kit, mono room preset on the entire kit as well) and it blew away anything I've done personally in metal machine myself. I am no mixing engineer, but for getting GREAT sounds and getting your ideas out there quick that really give the sonic push and idea you are trying to put across to your listener, there is nothing that touches this I've heard yet. DEFINITELY worth the measily 50 bucks (38.99 at audio deluxe).