I ended up selling my wife's 9500i yesterday and went with a STI Driver. I did have a chance to drive with the other two units.
I like the STI Driver just a few seconds behind the V1 solid build as well as being stealth.
Between the three units sensitivity wise on K, KA bands (X band is disabled) the V1 leads the pack followed by the STI Driver then the 9500i.
The V1 just rocks at what it designed for pure unadulterated sensitivity, threat awareness a rock solid performer. I have had mine for I guess for three months 3.864 I would not trade it for anything out there although the STI Driver is one sweet detector.
City I use small l with the 30 second mute and unlock on four led's. Highway always "A".
Kudos to VR for an outstanding detector!!!