We’ve had our 5S for two years, so we’re experts in its strengths and weaknesses. Fortunately, any downsides are more than outweighed by benefits and the 5S is still a truly great smartphone.
We’ve also no issue with performance. We’ve been running iOS 9 for a few short days, but as with iOS 8, apps still run as quick as ever. This is partly thanks to the fact that the A7 processor is a 64-bit chip. As we said at the 5S’s launch, this makes it more future-proof than the iPhone 5 and 5