I went through many online videos to decide which tremolo pedal to go for and I am very satisfied with the purchase.
For what is essentially raising and lowering the volume, this unit can do it in an infinite number of ways. Running in mono into a guitar amp this unit can produce very smooth slow and fast tremolo effects, beautiful 50s / 60s jazz sounds.
Alternatively it can produce very harsh square wave oscillation effect sounds which would not sound out of place in a dance beat tune.
Then when you plug the stereo output, you get a really gorgeous rich stereo tremolo effect, where the panning can sound as smooth as butter.
There are probably many cheaper (and in many cases much more expensive) pedals for tremolo, but I think this is really good value for money. Sadly bigger than a 'standard' pedal (whatever a standard pedal is, but you get the idea), so fills up the pedal board quicker, but for the sound it provides, it 'pays for its space' on the pedal board very well.