The former Versions of the PC Version were nearly unplayable for me - i dont know what GOG have done but this version is far better. I dont get the reviews here - most people who gave less than 4 stars probably havent tried out the gog version yet. So: buy it, its amazing and definitively not worse than 3 and 4!
I really love this game. I bought it back then and played it to the end despite some obviously flaws it has; first and foremost its really frustrating that there are too few save points so that you have to play a level over and over again; also the movement and camera controls are a bit clunky and the swimming parts are especially bad to control. Despite those flaws the game is just amazing: it is probably the only Indiana Jones video game that really has the look and feel of a true Indiana Jones movie. The level design is great, the fighting is in its comicesque exaggerations fun to watch every round a new and the music, sound and voice acting is superb; even the graphics have quite firmyl stood the test of time. Give it a try if you havent checked it out yet (if you have, you will obviously have already bought it anew): A really well done action-adventure.