First of all, if you had in your possession or put them side by side with an iPad Air, apart from the fingerprint reader on the home button, it would be difficult to distinguish any other difference.
They are identical in size, weight, construction materials, and screen, despite having a 4-year difference. Of course, internally they are not the same since this year's model has a much better processor (A9) and double the RAM.
Theoretically, it is a step back in some areas compared to the iPad Air 2 (and of course, all the subsequent models in the Pro series), but the price at which it is sold makes it ideal, as it is impossible to find something equivalent or better for this amount of money, and by acquiring it, you have a mini computer with you that is sure to work exceptionally well for the next few years.
Yes, it is relatively heavy, the gap between the screen and the glass is noticeable, the screen resolution could be higher, and it could also have stereo speakers. It should also charge a bit faster since, although the battery is very large, it takes an exceptionally long time to fully charge the device.
But here is where the negatives end. It is convenient to hold in your hands despite its large dimensions, and the margins help you hold it steadily without touching the screen. The speakers are loud and have good sound quality, and the build quality is excellent. Apple finally offers its devices with a minimum capacity of 32GB, and at least for the basics and a little more, they seem quite sufficient!
It is very fast in whatever you ask of it, and the best is yet to come since with iOS 11, several things will change (for the better) for the iPads that will receive the upgrade (and this particular device will continue to be upgraded for many years to come).
The battery, once again, is excellent! In standby mode, it seems endless, as it remains active for many days (my previous iPad remained active in standby for about 2 weeks), while in use, it provides many hours of browsing, video, and gaming.
As for the cameras, I can't say much since I don't use the tablet other than the front one, which is a typical camera that does its job well in video calls.
Finally, the fingerprint reader is relatively good, but it is first generation (iPhone 5S) and cannot be compared in speed to those that have been included in the latest generations of iPhones. However, it does its job.
Overall, it is an exceptional tablet at an excellent price, ideal for those who want such a device - reliable, fast, high-quality, with support for many years.