i am using the Evo 7 rally art ECU now, for my opinion is it quite efficiency, good RPM response, better fuel consumption. it is save and user friendly for my Evo 7 compare to other ECU.
comparison
Stock ECU VS Rally Art ECU
RPM normal response VS Good response
Fuel consumption
full tank RM 80 = 280km/h VS RM 80 = 350
Speed cut 185 km/h VS no Speed Cut can reach 270 km/h
Car like very heavy VS Car is very light
G-force (normal) VS Fast
Power (normal) VS Best
boost meter 1.1 Boost VS Gear 1,2 and 3, = 1.17 Boost spike from 1.3
Gear 4 = 1.35 Boost spike 1.5
Gear 5 = 1.5 Boost spike 1.7
horse power 280 h/p VS increase H/P 25%
torque (normal) VS increase 25%
H/P drop after 6500 RPM VS drop after 7800