Pretty genius. If you want a power meter and don’t want to 1) shell out $600 plus a custom crank and/or custom wheel application, and 2) duplicate that cost for every bike you own (road/TT/climbing) or do without any training data at all when travelling on a rented bike, this may just be the solution. You want dual zone measurements? Buy a 2nd unit and they will automatically pair and break down your L/R power measurements. Use one and it will still calculate power output to within 2%, ignoring L/R balance. Fully waterproof. Works with all ANT+ compliant devices. Read all about it here.