Okay .... I will take the bait ....
When I bought the Varia on a Black Friday special it made financial sense more than anything else.
Some random thoughts after a few thousand km :
- The battery life sucks, when you are wanting to do long day rides, i.e. more than 5 hours (obviously not a primary consideration, still it should be easier to manage this ...)
- The beeper drove me crazy on the first ride !! When commuting to work or cycling along Bottelary road you WILL encounter hundreds of vehicles !!! A non-stop beeper quickly looses any relevance. Bit of a shlep, but you can mute it ... pit that you cant un-mute it quickly (one-button) for hazardous sections.
- The indicator lines on the bike computer is my "mirror", tracking cars from about 140m. So I can now track vehicles behind me, while concentrating on what is happening ahead of me. Riding towards Philladelphia (no shoulder) I can see a vehicle approaching, and then quickly scan my computer to check for vehicles coming from behind. I can now make an informed decision on the traffic and my response.
- The Varia has an auto-adjusting flash rate as a vehicle catches up to you. When I am driving it is so easy to spot the Varia users as the changing flash rate "helps" to grab your attention. THIS is probably at the heart of your question ..... I know that I am doing what I can to improve my odds ....
Disclaimer - NOTHING will help when a driver is "not paying attention"
- Back to the battery life ... every so often the Varia decides to switch "off", i.e. the light is off but starts its adaptable flash mode as a vehicle is closer than 140m .... thats about 7 seconds when a vehicle is traveling at 100km/h and you are cycling at 30km/h in the same direction ..... time wise probably okay, but a cheap flashing light can be seen long before that ..... When commuting I use a standard flashing light + the Varia
- Clear to say that I do support the use of a Varia, but I am by no means a blind follower .... certainly room for improvement
All things considered .... the Varia does not mount well on the full suspension bike (the base of the dropper post means the Varia is too low and the tyre drastically reduce the effectiveness of the radar .... I feel uncomfortable and exposed on this bike with traffic around me.
Different approach .... ONE ride with the Varia and @Zebra also bought a radar-light (different brand). Its just one of those things where you use it once and you are sold on it.