I loved my iPhone 6/128GB device. The only thing that really appealed to me on the newer models was the larger screen size. I came close to going back to the "Dark Side" and getting an Samsung S7 edge model but couldn't quite pull the trigger. The problem is when you get into the iEcosystem, it's like the Mafia. They make it so darn seamlessly easy to upgrade devices, you just can't leave.
The plan was to wait until September for the iPhone 7. Someone recently traded in a used iPhone 6S+ in good condition and I decided to try it. I knew the screen size was 5.5" versus my previous 4.7" and the resolution went from 1 million pixels to 2 million. The difference was pretty blatant.
I also knew the camera would be a significant upgrade and it was. I went from 8mp to 12mp on the rear cam and from 1.2mp to 5mp on the front (selfie) camera. Pictures are sharper and brighter on the 6S+. I almost feel sorry for the camera manufacturers because this new iPhone makes buying a stand alone camera almost redundant.
I also noticed that the A-9 processor seemed much faster than the A-8 in my iPhone 6. Streaming video was a much nicer experience on the 6s+.
As far as the 3D Touch feature, either I haven't figured it out, or it's overblown. I could care less about that feature. The only two downsides I experienced were the following:
-The larger size, while easy on the eyes, is not as pocket friendly when wearing shorts. The larger size also makes one-handed dialing a bit more challenging.
-The accelerometer (device that switches screens angle when turning it) seemed much more sluggish and did not respond as quickly as my older iPhone 6 model.
That being said, my wife is now the proud owner of my iPhone 6/128GB and I am now pretty happy with Big Momma!