First played this in 1994 when it came free in a CD Rom upgrade kit - which I think may have cost $400. As I remember that version ('multimedia', perhaps) had little introductions on each of the guests which are absent from this version. I never made it thru the original game since it would bug out at the Microscope puzzle and crash.
The best reason to play 7th Guest is the wonderful music by The Fatman, you might also like to play it to get a glimpse of what gaming was like in the 90s. We were all in awe of the full motion video - the eye candy impressed us all - even if the game did not actually work. Today, the movement with FMV is rather tedious, and the 'content' of navigating the house feels rather annoying - with the chattering teeth possibly showing you an interesting flavour animation, or possibly sending you somewhere else so that you have to clunkily retrace your steps.
The acting is hammy, but there is fun in that - imagine the game as a hybrid between the horror genre and pantomime.
Some of the puzzles are fiendish if your spatial and chess-like skills are not strong. At times I found the word puzzles obscure and tenuous given the in-game hints. At least one puzzle I found really not enjoyable since it involved a full blown strategy game unlike any I'd seen before, where the AI makes the perfect move every time. Luckily, you can go from a puzzle to the book on the coffee table in the Library for hints, and on the 3rd return the puzzle will be solved for you, so you can bypass it. Unfortunately, even when you're confident that you can solve a puzzle, Stauf's impatient voiceovers and Precious Pup-like giggle will have you racing for the nearest walkthru just to avoid hearing them.
The game is a historical curiosity, the graphics were ground breaking at the time - I remember playing the animation on the painting at the top of the stairs over and over with a mixture of fascination and revulsion. Wait for it to be on sale for a dollar or two and you won't be disappointed.