I've been on an iPhone 5S for a few years now, but the battery was wrecked (I actually did use the 3G for a short time to hold me over) and have been looking for a new phone. I considered switching to Samsung as I am moving away from the Mac platform too, but after looking I decided an older iPhone would be fine for my light usage. After pondering between the 7 and 6S I decided 6S. Main reason was I got a good deal on a 6S, trying to save cash where possible right now. Headphone jack will be nice too. I mainly use it as a basic phone, and a GPS for Maps. I probably won't update the iOS on it unless there is a really killer feature in the future and it doesn't slow the phone down. Gonna try and hold out with the 6S for a few years, maybe until 2022.