hi bro still remember me?im KC,wanna give my review here.Ok after installing this product for 2 days,i can feel my car really responsive at PO7-PO9,the throttle is light and rpm easy to climb up and pick up of the car is totally great & fun to drive.For the EC mode i still monitoring my fc but then if i set to EC 5 i can feel my throttle is heavy and i felt it really can save petrol if use at highway for long distance travel and travelling at flat highway.But if you use ec 7 you will totally feel the car moving like tortoise haha,overall i can say this product is worth the money and most important you wanna race anytime just set to PO and if you want it slow & steady just to save a lil fc just set EC anytime also.

btw my car is proton persona iafm auto with matspeed 255/258 cam,i even retarded both in & ex 1 degree each for better idling and yet still can feel the improvement after getting this product.Thanks kent for explaning the product function to me with patient.