I had my car serviced in February, the software was updated.
I think I noticed a slight increase in fuel economy( extra 30-40 km per tank), perhaps at the cost of aggressiveness.
I am unsure because I haven't had the car long enough and the economy increase could have been just me easing off the gas pedal with the high gas prices.
128i Sport 6MT converted to Euro 130i spec, 3.73 diff, tuned by evolve ~220 whp 207 wtq(ft-lb) SAE
In-progress: //M front arm, M3 rack, e36M lip Wishlist: Coils, n55 mnts, headers, LSD, e60 finn diff
"The 1-series is the last car that BMW engineered before the Germans, as a car-making culture, fell out of love with driving." - R&T 2013 135is