M.G. Siegler, in a reasonably short piece on his hands on experience with the iPhone 6s Plus:

A year ago, after going back-and-forth as to whether to get the iPhone 6 or iPhone 6 Plus, this time around, with that year of usage under my belt, the decision seemed easy. I went with the iPhone 6s Plus. The rationale is simple: bigger battery. That continues to trump all for me.

Here’s Apple’s battery life projections for iPhone 6s / iPhone 6s Plus:

Talk time: 14 hours / 24 hours
HD Video playback: 11 hours / 14 hours
Audio playback: 50 hours / 80 hours
Standby time: 10 days / 16 days

As you can see, there’s a significant battery life bump when moving from the 6s to the 6s Plus.

I do still prefer the form factor of the smaller iPhone — it’s both easier to fit in your pocket and easier to use with one hand — but it’s definitely nice to have the larger screen if you do a lot of reading. The slightly better camera (optical image stabilization) continues not really to matter to me in practical usage. But still, another nice-to-have.

This is a big issue for me. My thinking is, optical image stabilization will mean better low light photos.

Anyway, the absolute key of the new device has feature parity across both sizes: 3D Touch. In my mind, this is easily the best new feature Apple has launched in quite some time in an “s” model of iPhone. And, as more developers implement it, I have a feeling I’m going to upgrade it to best new feature Apple has launched in quite some time, period.

Yup. And if you haven’t already, take a read of Allyson Kazmucha’s love letter to 3D Touch. Really brings home how important this feature is, and how you’ll actually use it.

I’ve not spent any real quality time with the 6s Plus, but that’s about to change. Mine is on its way!