It's worth the price, imo. But the base game doesn't offer that much. There are three big-box expansions that add sections to the main gaming board, along with a plethora of cards, monsters, investigators(the characters you're playing with) and bosses(Ancient Ones). I own the base game along with one big-box expansion(Dunwich Horror), and two cards-only expansions.
Each expansion introduces tweaks to the gameplay, as well as new types of cards.It's very addictive, and infinitely replayable, imo.I play it with my brother on the weekends.
The only downside is that with each expansion it becomes more of a chore to set up(if you want to play with all expansions) due to the sheer numbers of cards.
If you're gonna invest in it, get some boxes to hold the different types of cards, because eventually those accumulate to a huge amount.
There's also a vast fan community that constantly adds new content to the game via a program called Strange Aeons. With it you can design your own cards, rules, investigators, monsters, etc. Pretty much everything.