Messaging on the iPhone has always been a tricky area to call, and this device is no exception. On the one hand, the range and stability of the options to talk to other people with your fingers have been superb, and iOS 7, 8 and 9 take this even further than before.
The way things look is just so much more complete, and when you're doing something simple like swiping away an email, the new blockier interface gives you so many options in such a small space.
However, the same screen is getting very cramped for typing these days, though the introduction of keyboard customisation with iOS 8 is very welcome.
Now you can install a third-party keyboard like Swiftkey and swipe around from letter to letter without lifting your thumb from the screen. It's great for one-handed typing and there are plenty more keyboards to choose from in the App Store.
The predictive text isn't too bad though, and seems to have improved over previous iterations of the iPhone. But not being able to simply add in a full stop without having to measure a tap and slide just gets too aggravating at times, and the fact your finger will often cover the area that lets you know when caps lock is on led to a few expletives.
With iOS 7.1 the keyboard was mildly enhanced to make it easier to see when the shift key is pressed - in reality, it's just a bit different and many people might not even notice.
In iOS 8 you'll find the predictive powers have grown and suggestions sit beneath the text input box now. There's also a microphone to the right of the text input box that allows you to record and send audio messages.
Email, SMS and iMessage
As mentioned, email on the iPhone 5S is excellent thanks to a combination of fast speeds and a strong UI that makes it a breeze to whip through missives from your boss.
The folder organisation is fresh and easy to use, and you can simply choose the options you want in the mailbox instead of just a list of the accounts you've got on offer.
A swipe to the left or right on the message will give you the option to delete said email or quick reply without having to open the message itself. It's clean and crisp and, the smaller screen aside, it's very easy to manage your mail.
Mail does seem to be one of the harder apps on the operating system, with a couple of pauses noted when jumping from one app to another.
It also caused a crash on a couple of passes through different apps - I'm not used to this kind of thing from Apple, and it's been noticeable that the iPhone has suffered more crashes than usual since iOS 7 rolled around.
The impressive messaging experience continued when using the SMS and iMessage apps – the only real difference between the two (and thus when you know when it's a free messaging service or a paid for one) is there will be green or blue accents rolling around, including the bar that fills the screen as the message sends.
The ease with which you can send a photo is great, as a quick tap on the icon will enable it and iOS 8 has added the ability to send videos, audio recordings, and even share your location directly with a contact. You can even share your roaming locations for a set period of time.
There's also a change for individual contacts as the "Contact" link at the top right is now "Details" and it enables you to set "Do Not Disturb" to mute single or group conversations, and see the full list of attachments you've sent and received to that contact.
With the latest iOS on board the iPhone 5S it means Twitter and Facebook come baked into the handset - head over to the settings menu and tap the relevant social network to sign in to your account.
Signing into these social networks in the settings menu of the iPhone 5S allows you to quickly share content to both without having to jump into the dedicated applications - which aren't installed by default.
Say you want to post a photo to Facebook, just head on over to the Photos app, select the image you want, tap the share button and choose the FB icon.
Instead of taking you out of the application and into Facebook's own offering, you instead get a little pop up box allowing you to tap in your message, select an album to post the photo to, attach the location it was snapped (which are both optional) and the audience you wish to view it.
A similar pop up box appears if you select Twitter, but obviously with fewer options and a counter for 140 characters.
Pull down the notification bar though and the "Tap to Tweet" and "Tap to Post" buttons are no longer sitting proudly at the top of the screen - so you'll have to fire up the dedicated apps (once you've downloaded and installed them) to update the world on what you had for breakfast.
I bemoaned the iPhone 5 and iOS 6 for Apple's poor implementation of the baked in social features and sadly things aren't getting much better very fast. I'm sure there's some cool stuff Apple could do with this functionality, but it's obviously yet to realise its potential.