[daveeb]

I updated to nougat on my Samsung S6 about a month ago. Took ages, and most of the visual "improvements" are worse to my eyes than what they replaced e.g. all the icons have changed to a more muted appearance. There may be improvements under the bonnet, but they aren't obvious to me at least. In a nutshell the phone isn't any faster or slower, just slightly different.
Given my time again i'd probably have left it as it was, although as you mention it doen't half nag to update and i'm not sure if you can turn that particular notification off.