The TaylorMade Qi4D represents the pinnacle of seven years of engineering, successfully merging the speed of the SIM with the forgiveness and stability of the Qi series.
Their scorecard
Forgiveness: 5/5 — Tightest dispersion and spin windows
Distance: 5/5 — Highest ball speed of the test
Sound & feel: 5/5 — Refined carbon wood sound
What they rate
Qi4D offers the tightest standard deviation in launch and spin
Matte finishes on modern heads are preferred over older glossy designs
Carbon face technology has matured to provide superior sound over titanium
What they don’t
The SIM 2 and original Stealth models were noted as low points in feel and consistency
Stealth series can be highly volatile in spin rates (dropping as low as 800 RPM)
The TaylorMade Qi4D represents the pinnacle of seven years of engineering, successfully merging the speed of the SIM with the forgiveness and stability of the Qi series.
Qi4D offers the tightest standard deviation in launch and spin
Matte finishes on modern heads are preferred over older glossy designs