Ariel Adams at aBlogtoWatch thinks the learning curve is a bit steeper than might be expected.
It's a good article and well worth a read. He asks a lot of questions about the
Watch and offers his opinions as an expert in horology.
He also brings up this point, which I have managed to miss if it's already been posted elsewhere.
After Training People To Forget About Watches, How Will Apple Teach Them To Love The Apple Watch?
So what is it like to wear and use the Apple Watch? I haven't discussed that too much. As you probably know, the Apple watch has several types of input methods, including the touchscreen, crown, pusher, motion, and voice. Between talking to it, pushing it, swiping it, and moving it, there is a lot of potential in how you interact with it. Is the Apple Watch something which is as intuitive as an iPad? Not exactly. Given the size and features, the Apple Watch has a steeper learning curve than some people might like. That isn't to say the Apple Watch is complicated, but consumers will need some time to understand how it works. For example, tapping the screen is different than pressing the screen.
It's a good article and well worth a read. He asks a lot of questions about the

He also brings up this point, which I have managed to miss if it's already been posted elsewhere.
Each Apple Watch is paired to your iPhone (which is where you download apps and control some of its functions). Each iPhone can only be paired with one Apple Watch at a time - which means you can't have an Apple Watch Sport for exercise and an Apple Watch on a steel bracelet for more formal attire. Apple says people should just swap out straps, but I think they are missing the real value of having a diverse set of fashionable products. Anyone who loves watches doesn't just have one, and I truly hope that in due course, Apple makes it comfortable to own more than one Apple Watch without having to own more than one iPhone.
After Training People To Forget About Watches, How Will Apple Teach Them To Love The Apple Watch?