I got this to go with my iPad Air 4. It matches up very nicely. The keyboard feel is much better than the squishy cloth one of the earlier keyboard. The overall folded up unit with iPad is very compact, but for lots of use cases you will still want something like the folio cover because you will be removing the keyboard often.
The stand feature is very nice. It is limited to landscape only, which means some older apps will want to be sideways. The keyboard and trackpad work very well compared to separate devices and having to set them up. There is no software or Bluetooth to setup for this at all.
Dislikes: no dedicated shortcut keys like other made for iPad keyboards, there are shortcuts, but they are secret. The main drawback is the cost, the recent price drop puts this at the top of whats reasonable to pay, it was too expensive before.