From the bit that I played, it's great fun with friends. It feels faithful to the source material, and its non-linear and flexible design leads to some hilarious shenanigans with both friends and randos. It's also free, which is a double-edged sword. It can be a bit rough around the edges, one example of which is the obtuse server hosting system, and personally it's not a game I would go out of my way to play with by myself (with randos). However, free is free, and that paired with being a great time with friends that anyone can hop into means there's no reason why you can't give this a go with a group.
Sometimes it is really janky and confusing but SCP: Secret Laboratory is one of the best multiplayer games I have ever played. The player roles all make you think and play differently and there is so much to learn; memorizing what rooms serve what purpose, how to take down SCPs efficiently, finding a path to escape as a Class D or Scientist, and so on. The game is definitely made or broken by the people you play it with, though. If you can manage to gather a group of 8-12 friends for a night, it is an absolute blast playing and learning everything Secret Lab has to offer in terms of gameplay and roleplay. Could do without the occasional crashes and long connection times, though.
One of the only 5 multiplayer only games that have been able to hook me enough to get me playing regularly everyday, but it's able to stand out from the crowd by its unique gameplay. You can play hundreds of rounds, and almost every time it'll play out different. Of course it will eventually run out of ways to be unique, but with the right players, it's magical.