Rainbow Six Siege is a great game, and I've had a lot of fun playing it.

However I would recommend if you are thinking about buying it, to have friends to play with as the game itself, is far more enjoyable when you play with people you know.

It is a game focused on giving as much information to your team-mates as possible and I find the communication can be lacking when playing with randoms.

Pros:

+ Different operators with unique abilities to choose from.
+ BattlEye
+ HIGHLY TACTICAL game.
+ Wonderful graphics.
+ DLC doesn't limit anyone, You can play DLC maps for free and unlock DLC operators with in game currency.
+ Most skins only cost in game currency.

Cons:

- Teammates.
- Trolls in ranked mode.

OVERALL!,
"Excellent game that combines everything for a player looking for a HIGH-LEVEL shooting game."