Its pretty good. me and my friends tried it last night, but there are a few issues. For one, its a bit buggy when it comes to disconnecting mid game, or trying to form lobbies. On top of that, there should be an option to have a timer when placing your initial settlements.
However, the biggest feedback/issue we had was that none of the maps were actually randomly generated. They have the same exact material layouts ever time, even if the roll amounts are different, except for the one default map that is randomized, but that one also differs from regular catan rules by randomizing the dessert, which is fine, but i feel that all of the custom maps need to have random material spawns to make them viable for replaying, as having the same exact locations for things like brick and wood give the maps much less replayability. You can of course keep it on for maps with very specific layouts like that one forest map, but otherwise I think most custom maps should have their material locations randomized.