Are you getting the same model? I've seen at least two other similar devices around online for $2-300. I noticed there is a huge difference in throttle response between one car and another. We have some Mirage's with excellent throttle response that are nice to drive, you don't need to floor it anywhere. They move quick enough with 1/4 throttle. Then there are some that like my own car where you gotta floor it well before you need to cause it takes a second or two for it do get up and go. I noticed this in two 2015 mirages with similar mileage, both having around 230,000kms or more. Even the 2017 I took out of town last week was a bit of a turd.
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View my fuel log 2014 Mirage SE wussie cvt edition. 1.2 automatic: 37.7 mpg (US) ... 16.0 km/L ... 6.2 L/100 km ... 45.3 mpg (Imp)