I just tried on the new Apple Watch and was immediately impressed.
Both of these watches are expensive ($399 and $699). Are they worth it? I am not sure just yet. I am in the process of trying to figure out if I will order one. You can't buy in the store and it is now back ordered online until June or perhaps even July. I do want to replace my chest strap heart rate monitor that is hooked to my iPhone. Glacing down at my watch would be a much simpler way to figure out if I am at my target zone especially during a bike ride. I can also see how it would be useful for patients who need to closely monitor their heart rates during exercise because of its simplicity.
Let me know what you think if you have tried it on and if the watch will have any specific medical or exercise applications that will be significantly useful.