At this point, I plan on going with the S8+ up until the redesign iPhone comes out.I most likely will. However, I think if I stuck with it and made it a couple months I'd be fine. It's just the transition period that's tough. I'm so happy and comfortable with my iPhone that I never make it past that transition window.
I have an iPad to keep me tied to iMessage, I'm really digging the design/display of the S8+ to return it.
But then again... My plans could change, I've got until Sunday to decide, but when there's the 7+ and S8+ by my side... I tend to want to grab the S8+.