I tried a friend's Apple Watch the other day and it's quite a mixed experience. On the one hand, the watch itself looks and feels very nice, with a beautiful screen, and a slim, well made body. The haptic vibrations feel great and the watch faces look very good. It's a great watch that shows you lots of useful information.
Where it really, really sucks however, is apps. As soon as you have to go into that mosaic home screen and scroll and flick through anything, it becomes a nightmare. It's slow as hell, you may be waiting minutes before you can get something simple done. Apps open slowly and many things you do requires authentication from your iPhone, so you might as well just use your iPhone.
The interface is also not very intuitive. I keep forgetting that Force Touch is a thing, and I'm not sure when, where and why to use it. I'm not sure what the side button does and what it's for beyond bringing up a strange menu with contacts. When the first iPhone came out I instantly knew how to use it, but the watch is different even though I now have years of experience with similar devices.
I don't really think that it should have apps at all. This should be a device that is almost read-only, like any watch. You should look at it and know what's up, and if you're interested in doing anything, you should do it with your phone, which by the way must be in your pocket anyway for the watch to even work. It's great for getting notifications, to check the time, to see that someone replied to your text message or an email, but it's not great for anything else. It's nice to have basic, important, up to date information on your wrist. But for interaction, I think the extreme slowness and tiny screen don't really give an acceptable experience. And I don't think it should be interactive. That's what your phone is for.
What I also don't get is for those who bought the gold version - will they also be buying a new one every 2 years? Or are they meant to be sticking with the ultra expensive jewelry-level watch for life, which will no doubt be unusable in 3 years do to software updates that disable it just like the iPhone? Is this a disposable device for the price of something you traditionally inherit and wear for a lifetime?