just installed a powertronic ECU a few days ago on my svart 401
current system is akra slip on, decat, coober airbox lid, k/n filter. map 1 really smooths out the powerband more, and map 2 is for gluttons for shifting, it runs through gears so fast! honestly the hardest part was taking off all the damn connectors and routing the wires under the fairings. installing and running the software was a piece of cake. low end jerkiness is smoothed out considerably (though its still there! just less), and acceleration is smooth across the powerband. i chose the powertronic over the coober since i dont like only having 1 map and it opens up the door for further tweaking. i dont regret my choice in the slightest