The ideal solution to make an electric bike go faster !! Installation is done in a few minutes and everything works perfectly from the start. In the ECO mode the bike runs at a comfortable 28-32km/h, whereby the unpleasant "on-off" behavior at around 25-26km/h is eliminated. Furthermore, around 30km/h the range of the battery remains acceptable. If you want to go faster, then the STD or HIGH mode offers the possibility to match the speeds of a Speed Pedelec. Only small minus : Due to factory tolerances on the housing of the Badass unit and the speed sensor, there is play on the electronics and it keeps moving slightly while cycling. (Does not affect proper operation, but can cause premature wear due to friction). I was able to solve this with a narrow self-adhesive strip of neoprene rubber. Nevertheless, it's a super product ! With kind regards, JB