I have used different double pedals over the years and recently I made the decision to invest in one of my own.
Pros: It very sturdy and robust. Very quick and responsive, which can also be adjusted by changing the cams (4 pairs total in the package). There are even more settings I have yet to explore, which are detailed in the booklet coming with the package.
The hard case is amazingly sturdy and so neatly organized into compartments. Not to mention all the tools you would need are also included (two allen wrenches of different sizes, as well as a drum key)
cons: The slave pedal drive shaft connections started squeaking after approximately a week of use. The package does not contain any lubrication material, which would have to be bought separately, but obviously alternatives can be used to the NiNja bearing oil suggested for use.
Shame I have yet to develop a skill for these pedals to show their full potential.
100% worth its price, but it is necessary to also ensure proper maintenance of this otherwise perfect piece of hardware.