Very smooth. The only "issue" is that the FOV scales with the resolution of the window, so the bigger your window the more of the board you see and the easier it is to plan your route.
This shouldn't be the case if aspect ratio doesn't change. I've tested with changing resolution (e.g. 1366x768 vs 2560x1440) and the view is the same. If you made the aspect ratio narrow/wider though, you will see less/more, and that's just inevitable unless I force an aspect ratio on the game.
