Game is standard Baldur’s Gate. It is okay for what it is. If you liked Baldur’s Gate, you will like this, as well as Alliance 1. I’m not sure where people are finding the cheapest original games. A look at Amazon found several sources, all as high or higher than GOG. Also, remember GOG stands behind their games. Online vendors may not.
First, I want to thank GOG for bringing these back. I remember networking and playing with my wife and both sons. Awesome memories, a lot of laughter and great fun. DS 1 will always be my favorite with Legends of Aranna added in. No more hacking to load and play. DS 2 was a good game but the graphics did suffer a little. I missed the mule! DS 3 was different altogether, but I have played many hours on all of them and never regretted a minute!