I use this double pedals for 2 years and I am the aujoud'hui;
I find a certain lack of flexibility (regardless rglage), return, and the sound is "dirty". Also, I'm the oil again and again, and disassemble for cleaning, the mcanique creaks and we feel a gene in the fluidity of movement. However, it remains effective for a beginners, personally I will change to a janus.
EFER Obviously I do not have that choice (for a person seeking to invest once and for all in a double pedals)