I've not tried the E-Manage but I previously installed the SAFC II on my 3S. Didn't notice much difference in FC nor better respond but only after I removed it, the difference can be felt on both FC & repond ! Hahaha.
My house's very near to my kids' school & tuition place, so it's stop-start, stop-start kinda driving, you know the traffic lights, the school area traffic jams kinda thing. So the FC could go down to only 200+ km/ tankful.
The 300+ km/tankful I mentioned earlier is including outstation on trunk roads & town driving la, not highway driving (haven't tried on the highway yet).
However, the E-Manage Ultimate's additional function's more for turbo cars rather than for NA or track use (data logging). The basic function remains almost the same as before, I was told. I was offered the E-Manage (blue) with ignition included, for RM 1.5k inclusive of dyno / road tuning. Is the price reasonable ?
Bro 7, I saw hte Ultimate's selling at RM 2090 (not inclusive of installation, I think) in Pg. Is that cheap ?