Rise of the Tomb Raider is an amazing game, for someone who played the "Tomb Raider (2013)" on Xbox 360/Xbox One. This newest one is even better. Sadly though it does have it's flaws. I have a 1070, i5-6600 and 24 GB of RAM and in specific parts/areas of the game, FPS will dip to 30 - 45 FPS and it has lag spikes at random times. Other than those core issues, the game is beautiful on High settings, I didn't push it for Ultra.
While getting side-tracked, lost, dying, completing tombs and doing side quest missions/challenges, I finished the game with around 87% done in 21.4 hours of Steam playtime. So it will definitely give you your monies worth and at a sale price of $11.99, kinda hard to beat that.
As a friendly tip, if you are an achievement hunter, I suggest you read and go through all the achievements. Because some of them require you to do them before you beat the game. Tomb Raider is one of those game series that I will always try to get 100% completion, I don't know why, it just feels good. I know for fact that I'll be hoping back into the game to get that 100% achievement. I personally can't wait to get "Shadow of the Tomb Raider" on sale and play that Tomb Raider next.
At 25 hours exactly of Steam playtime, I 100% the game.