Wahoo is excellent during day time. It is easy to operate too through the smart phone. But it is not suitable for night ride. I can not see anything . May be some problem in setting.
After a lot of review listenings & comparison study decided to buy the roam. Totally satisfied with the product and what I luv the most is the integrated Strava Segment.
I hv forgotten my edge 820. There can't be a better review than this I guess.