Browning would end up licensing it to SunTour circa 1990, who would rechristen it the Browning Electronic AccuShift Transmission (BEAST). With continually dwingling market share, they were getting desperate to regain some ground on Shimano and thew BEAST didn't help matters. In fact, it arguably hurt their reputation even more.
Issues? Designers didn't see the need to add an extra ~300g of weight and more cost to their bicycles. Avid cyclists didn't like to be told they didn't know how to shift properly. While, as the test states, it worked fine in the desert, I recall not so glowing reports coming out from wet and muddy tests. Lastly, Shimano was "in" and SunTour was "out".