That they don't tend to work after being in the direct sunlight for a while. That's the big negative.
2012 Ducati 1199 Panigale
2012 Ducati MTS1200St Ti
2003 Aprilia Tuono Racing
2012 Vespa 300 Super
past: Ducatis, Aprilias, Moto Guzzis, a Husky, and some BMWs as well.