I’ve been using it pretty happily with Horizon.
I recall that I needed to tweak it a bit in order to get a wider view of the Kanban though, as Horizon is a bit tight horizontally in the middle. This is the CSS I used:
// Allows Kanban view to take up whole width of main container and controls the column width
@media (min-width: 40rem) {
body.kanban-active:not(.has-full-page-chat,.wizard) #main-outlet-wrapper #main-outlet>*:not(.experimental-screen,.activate-account) {
max-width: none;
}
}
.discourse-kanban-container .discourse-kanban-list {
width: 350px;
}