I think that the Gear is great and like it better than I expected to. The pro is that it eliminates many of the little things that I pick up a phone for, such as to check the time, read a text message or an email. It works for the way that I do things, as I read emails from my phone (in the past) but rarely respond from the phone.
I don't talk much on my mobile phone, but the call function of the watch has come in handy when a call came in and I wasn't near my phone. As my phone is often in my purse with tons of other junk, I often had missed calls because I couldn't grab the phone in time. The Gear eliminates that.
I haven't worn a watch on a regular basis in all of my adult life. I've missed how easy it is to just look at my wrist to see the time.
I can't think of any real cons. There are a couple of things that need to be fine-tuned. One is that email pop-up notifications synced through the email app on the Note 3 display the sender's name on the Gear. However, GMail pop-up notifications don't show the sender's name if it is synced through the GMail app on the Note 3. I want GMail notifications to be the same as email notifications. Also, if someone sends a text message and I start my reply, but another text message comes in, I have to start over with my reply. It's not a big deal since it is done via voice dictation, but there should be a way to finish sending a text message before receiving the notification for an incoming text message.
I suppose the proprietary charger could be seen as a con, but I'll get over it as soon as I can get a travel charger.