UPDATE -10 months in. Monitor continues to impress. Battery life crazy good, links to Zwift everytime! Very accurate. Still loving this HRM.
Original review. I really wanted to use my Apple watch as my HR monitor while I am Zwifting. But as others have said, it is extremely difficult to get the Apple watch to reliably link to the Zwift training App. I picked up this Coospo HR monitor and it linked perfectly right out of the box. It links up quickly everytime i start zwifting and it is always within 1 bpm of my Apple watch. Only change I made was to swap out the provided strap with Onewly 22mm Woven strap. It makes putting it on and off my right wrist extremely quick and easy.