This thing is god awful and the word "tube" should not appear anywhere in the name as it sounds nothing like a tube. Unless the tube they're referring to is a toilet-paper tube then in that case, it succeeds in spades. The GUI looks relatively nice put it seems the controls are a bit wonky. Hard to get a precise setting from them. Seems you can move the mouse straight up to the top of the screen and the knob will advance about an eighth of the way around. The sound is pure crap. Granted, I play mostly metal, but even getting a decent clean tone or blues tone or lead tone is IMPOSSIBLE. I have yet to find a usable sound for ANY style of music. That is unless the style of music you play is akin to the sound of explosive diahrhea. The biggest feature is that its taking up space on my pc. Manual? Doesn't need one cuz you'll uninstall it immediately. Presets? like 5 or so. The first one is called "British Clean" but should've been titled "everything at zero" because literally...that's what the settings are. Value for the money? Even though its free I still feel ripped off...30 minutes of my life I'll never get back. Stability? Sure...but what's the point? There are PLENTY of other sims that are free and sound WAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAY better (and more convincing) than this ugly, ugly beast. Mark my words....I'll see you in jail.