Tempted to buy but not convinced enough yet topic

Ok I like techy stuff have been into computers for over 30 years and really like the look of the LG G watch R.
The other half was going to buy me a smart watch for crimbo, but i told her not to as I am not convinced it would not be just a gimmick and I would not use it after a few weeks ....
So I need a little bit of convincing, presently in the UK I can get this watch for about £200, if it was about £170 I would buy it now. (any deals I haven't found yet about?)
One problem is I haven't been able to see one in the flesh as only available online and one issue would be the size on my wrist.

Is there a user manual I can download? - I cant seem to find one ......

I understand the main function of any smart watch is for notifications without removing your phone from your pocket, but can you hold a telephone conversation just using your watch? also is it easy to reply to emails / text using just the watch with a keyboard or would it be mainly using voice to text?

Any help / advice from those of you who have used this watch for some time would be very much appreciated :good:

thanks in advance