I have been iPhone user since smartphone era. We had almost all the models of iPhone and iPad. Here are the 4 compelling reasons why you should consider buying an iPhone 7
1) Longer battery life
iPhone 7 will have up-to 2 hours of longer battery than iPhone 6s
2) Better low-light photography
Apple has improved camera system, you can get quality pictures in low-light on the iPhone 7/Plus ( check out these stunning US open photos shot using iPhone 7 Plus )
3) Faster A10 Fusion Chip
iPhone 7 models will ship with A10 Fusion processor, a quad-core chip which will be 40% faster than iPhone 6s (A9 chip).
4) Splash & water resistance
iPhone 7 and iPhone 7 Plus are splash, water, and dust resistant.
more over, iPhone 7 will feature iOS 10 which lets you to express Messages and use Siri in more apps.