I found it interesting that Apple's 'digital crown' concept apparently isn't very comfortable to use while my Android Wear watch (an LG G Watch R) is perfectly serviceable with just a single button (to wake it up) and the rest of the UX being driven via the touch screen itself. (The apps you open most often are always at the top of the list, so getting to my groceries app is a simple swipe left and a tap.) Similarly, it's screen is always on, so the most basic function of telling the time is always right there, no matter whether the accelerometer noticed me raising my wrist or not.
Of course, it does suffer from the same 'what can you do with it' problem that the Apple Watch does. Apart from dismissing notifications, using voice commands to set Google Now reminders or start the occasional timer/countdown, there really isn't that much useful functionality to benefit from. App-wise, I really only use two: one to track my groceries (Bring!) and one to tell me I've left my phone somewhere by alerting me of the Bluetooth connection loss (Cerberus).