This has got to be one of the best pedal buys I've ever made. Tremolo is a simple enough effect, but I was completely surprised at how expressive this pedal was from smooth and gentle classic tremolo to fast and jibbering spinning effects. It has such an organic, musical sound that I quickly found I was using it far more than originally intended (a good thing!).
The controls give you a wide range of speed and depth, and a hard (square wave) / soft (sinusoidal) switch give further options. A bright blue LED lights when the effect is engaged. The construction is rugged enough, but the controls are tiny and inaccessible and with the jack sockets just underneath the controls, everything feels a bit too cramped. This is the only downside to this pedal but still not enough to warrant a four-star rating. Being so well priced means that you could mod this pedal without fear: house the unit in another box or add an LED to indicate the tremolo rate, for instance.
On a pedalboard, it easily rubs shoulders with classic and boutique pedals without looking like a weak link. An amazing pedal at an amazing price. Well done Danelectro!