Loving the step up from the 6 to the 6S Plus. I have no idea why I didn't get the Plus last time. I think part of me thought it would be too big, and I also had an Android as my main phone, and an iPhone for work. But after using them both for a few months I was finding myself using the Android less and less.
Only 2 issues so far I've seen.
When it unlocks, which is stupidly quick, there is sometimes a slight delay in the unlocking, it'll start to render the desktop, then pause slightly, before finishing. Happened a few times, and not seen any particular reason as to why.
And my Home button seems to click quite a bit louder than my previous one. It's not the end of the world though.
Other than that, using it all weekend in London, I am really appreciating the extra battery life that comes with the Plus.