The Windbender-ST is a straight windshield with a more conservative attitude than the high performance model and has about an inch and a half of air lift over the top. If the co-rider is much taller than the rider, this windshield can be adjusted up to take the wind off of them and can still be looked through by the rider. Or if you just like looking through a windshield and want better wind protection than stock, this is the one.
If your solo riding style requires you to look over the shield and your two-up riding requires the wind protection of the ST, you may want to get a second top windshield (without the base). Slide one off and slide the other on. It takes only seconds and no tools are needed.