Basically the game runs great but the menu prompts are reversed for whatever reason.
http://www.kotaku.co.uk/2018/08/21/...astically-even-if-the-gamescom-build-is-weird
http://www.kotaku.co.uk/2018/08/21/...astically-even-if-the-gamescom-build-is-weird
The build we played was a little funky, the A and B button functions on menus were reversed so you had to hit B to confirm and A to back out of a menu, but from what I could tell speaking to the rep this was an issue specific to this build of the game, not a design choice.
This is Dark Souls on a handheld, with a stable framerate that didn't drop in any of the areas I tried specifically with the aim of making it drop. It feels responsive to control, and looks more than good enough to make the trade off for portability worthwhile.