Personally I think it's a little too early to tell, and I'm a person who loves party games. Wait a little while longer, see whether you'll find some friends to play it with (let's be honest, this game will be really boring single player), if there's ways you can match up with people even if you don't know someone to play with in person.
if you like mario party then you'll probably like this game, but it's not out yet so no one is 100% sure
The thing that makes Mario Party is the mini games and competitiveness. There really isn't much of a competitive aspect to this game as it is all 100% random and there are no mini games.
That being said, the board game part is not supposed to be the only feature. You should probably wait until near release to decide whether or not it is worth getting (and the price).