As the heading says, it's two shiny buttons. The buttons have good tactile feedback and the case has a nice polished finish. It feels like I could drop it from a cliff and it would still work, which is perfect for gigging, however it is a bit big, so it has a bit of give and take.
The lights are very obvious to see on the pedal so you wont be getting confused any time you use it.
The only complaint is that my particular ENGL head has Reverb, it'd be nice if this had a switch for that.