Party-Up Working Yet?

I have a friend wanting to know if party-up matchmaking and co-op campaign is working yet? He’s planning on getting an Xbone, but wasn’t sure about this game yet.

Partying up seems to be fixed, but I still run into trouble on co-op campaign of having the game crash periodically. Also, my general experience with parties and matchmaking hasn’t been solid (someone’s game either fails to load a map, or someone gets dropped, etc) but things may go differently for you.

Also, sometimes voice chat in a party stops working randomly. I don’t think this is a Halo issue though, pretty sure it’s Xbox Live.

I can party up but I’ve only been doing that with one friend. Not sure if it’s working with more people in the party or not.