The game itself is pretty fun, especially if you have friends to play with. The more friends you have, the better the game gets.
That being said, the game's online multiplayer only works within GoG and does not support multiplayer with Steam copies nor other consoles. If you have friends you want to play this game with, make sure you all buy on the same platform/digital store or you're going to be in for an awkward evening.
When I saw that Overcooked 2 was (FINALLY) available on GOG, I bought it immediately. It is, just like the first one, great couch-coop multiplayer fun that I can't recommend enough. I only gave it 4 stars though, because what really bothered me is that it is split into different DLC packs which is something I really don't like. I'd much rather have and appreciate a version that includes all of that already and feels more complete.
A really good couch-coop game.
But this GOG version is really disappointing, multiplayer only works between GoG users and, meanwhile the game is multi-platform on Steam, the GoG version is not and you can't play it on Linux.
Overcooked 2, itself, is a pretty fun game, unfortunately GoG goes not provide an experience that makes purchasing it here worthwhile. First off, Overcooked 2 is a native Linux game, which means that GoG has intentionally chosen not to include the Linux version of Overcooked 2 on their platform (once again continuing their unnecessary crusade against Linux gamers). This version also seems to lack the co-op capabilities of versions available elsewhere: no cross-platform between Windows and Linux gamers, and no co-op with those who own the game on other platforms (which is weird because the version available on Steam has Linux-Windows co-op support built right into the game and better multiplayer support).
So, to be clear, this version of the game, a game that is all about cooperative play with others, has the least co-op capabilities of any version of this game available on the market. You are stuck playing only with other people who own this exact version of the game, playing on the the same operating system you are using, who have also purchased it through GoG.
If you were wise, you would save your money and purchase Overcooked 2 elsewhere so that you can experience the game as it was originally intended and with the most long-term playability options as possible.