Smart watch recommendations

I have been looking at smart watches & there's loads to choose from , for reasonable prices. The ones I've looked at are u3, u8 u10 & m26. I think taking phone calls while phone remains in the pocket would be handy & remote picture taking would be good ( waterproof would be good but I've only seen rain proof ).

I would be interested in what any of you think about any smart watches & which ones to look out for . Are there must have features ? How do the generic ones differ from the branded & vastly more expensive ones.

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