Could be a great product but I broke the silicone sensor strap trying to install onto my hub. Tried to check Wahoo site for a replacement but Wahoo is out of stock so broken sensor straps seem to be an issue for this product. Now I have await re-stock at Wahoo to enable use/set-up of the Wahoo Elemnt unit.
The pros are it works. The con is that replacing the battery will damage the case. It is a terrible design. I have tried flat head screw driver, table knife and the case never opened without damage.