Been wearing it since lunch, don't really notice it all that much however I usually wear a watch. I didn't opt for the opposite hand. It has time as a large numerical on the initial UI display, so felt it could take place of my watch. I do use it with the screen on the inside of my wrist, so when I want to look at device I hold up my arm, palm towards me. Feels a lot more natural than wearing it and viewing the UI "as a watch".
Went for a run, tracked the run well. I forgot to set the device to record for a run, but it did track my steps, mileage, etc pretty well (compared it to Moves App on iOS).
Getting texts and phone call alerts on it is pretty nice, actually. I have phone off to side charging and this is a good alert system (I'm using iOS as phone).
I wish they had a button press configuration that allowed for a "flashlight" like app to display all white-light on LCD. Would almost feel magical/wizardry when taking the dog out to pee.
Will try sleep (one the main reason I bought) tonight. I use "Sleep Cycle" app on iOS (I sometimes have problems sleeping) so will be interesting to compare Band vs that app's morning results.