First off - thanks to Nate and all involved with the Konnected product. It is an awesome product and luckily I stumbled on it before the Kickstarter phase.
My old system was a typical Honeywell Vista 20P. Replaced it with a Konnected Main board and a Konnected Add-on board. Everything went together easily and so glad Nate redesigned / added the add-on board. I'm currently only using it to drive the door chime, but will add on some motions, or other hardwired devices.
Currently using a Fire 7 with Fully Kiosk running ActionTiles in the old keypad location. Powering it is a 12v - 5V usb adapter. Wall mount was bought off eBay
I'm powering everything with this - https://www.amazon.com/gp/product/B00R5CHZAO/ . Plenty of headroom for additional devices and tablets.
Overall, very happy with how it turned out. Still need to hook up the internal / external sirens, and do some cleanup, but it's working as expected!