I received this game for free from a friend.

The game itself is a clone of Super Smash bros games.

It's good game if you want to grind it for new Lego brawlers and items.
Cross platform is good because you are cross playing the game with people who are playing it from consoles.
Party mode is underrated feature, you have to invite friends who are playing the game and you can't invite strangers on party mode.
I have played with both keyboard and controller and for me the keyboard is more convenient than the controller in this game.