Magnatone was an amp from the 50s and I am very fond of Bo Diddley or Dale Hawkins and I was looking to have that vintage vibrato or in other words to get away from the traditional Hendrix vibrato sound.
I think the effect itself is very well done, it sounds very subtle, with a great sweep range and any position can be used, it's very musical!
The only thing I'm not happy about is that it adjusts the sound, not only is it a boost, but it compresses and thins out the tone of the guitar. It does this nicely if you combine it with overdrive, but it doesn't work with fuzzes. Outside of this personal drawback, the pedal is of boutique quality and price. It deserved it because its competitors are much more expensive! So if you are looking for a special vibrato sound, although not so vintage, it is highly recommended!