IMHO the absolute best thing about Blink is that it lets you use caps lock as control. Since doing this remapping on my laptop it is now a part of my muscle memory but no bluetooth keyboards support this in hardware and iOS does not support it in software; Blink manages to support this in the app and it makes my SSH sessions and remote editing so much easier.
Includes mosh support so you can sleep your iPad, switch between LTE/Wifi, etc - then later continue your terminal without interruption.