iKAT or Roost Boost

Anyone running the iKAT or other spark improvers? Those of us from the 70's 80s may know these type of this as a "Roost Boost"

Device Claim is: More and more usable power and easier starting etc.. due to improved spark duration

Any experience with these?

Seems like snake oil for a modern 4 stroke. Some general searching of other forums like Thumper Talk produced some 'teardowns' of the product, where people disassembled the thing. They found its just a cheap resistor. Couldnt find any positive reviews for modern bikes.

For the money, a bigger rear sprocket will actually produce results.