I have 2 vruks and I cant see the difference or my pedals suck. If you're a beginner and can afford a pedal with direct drive(Axis TRICK, Speed King, Flying dragon), then you could use this tool to the extreme. If you have a chain drive, there's no use- the chain drive will slow you down and you won't be able to use it correctly and quietly.
The Vruk is simply an extension that allows you to pull the beater away from the head with your own foot and not relying on the spring, so there'e definitely more control in you kick. The techique is similar to open-close on the hands- one stroke performed by the whole leg, the second one by the foot only(similar to rocking motion).
I understand the concepts, but my shitty chain drive and lack of time makes it impossible for me to start my bass drum playing all over again so the vruk will have to wait for me until I get better pedals.
to see what you can do with the vruk check out www.vrukpedal.com http://www.youtube.com/watch?v=0BRrE6fimYQ
here's a vid of Tims speed run
Well, using a Vruk is like a whole another dimension of your playing. It's more natural, because te beater comes of the head because of the rebound and not the spring. You can only push the pedals downward and the upward motion is created by the spring. With the vruk you can actually pull the beater away from the head yourself. That's a big difference.