One about backstab and shadowing beyond.
The Rogue is definitely a great class. Even better, they are 1 of 3 classes in the game exclusive to your PC or adventurer you make. No companions in the game are Rogues (*cross fingers for expansion to include extra companions*).
Rogues are the highest SINGLE-target DPS class in the game. If I recall correctly, all of their abilities are single target, no AoE abilities. But I may be wrong.
They start with Sneak Attack which does bonus damage with all your attacks when the enemy is affected by afflictions. The Rogue has a multitude of ways to apply afflictions, but better yet, can take advantage of those afflicitions with sneak attack. Furthermore, within the first 2 seconds of combat, you are guaranteed a sneak attack. They are quite squishy, but have ways of reducing their damage through certain abilities that you can choose. They can crit A LOT, and when they crit...they crit hard, very hard. They have many multipliers including backstab, sneak attack, + more including talents that will make them hit harder throughout the game.
They also have some good defensive abilities by turning invisible, or swapping places with enemies or disengaging with the Escape ability.
The Rogue class can even kill an enemy from stealth before combat begins due to his backstab and other damage multipliers at play. They can also utilize firearms very nicely. Dual weilding is great for the attack speed as well.
If you like to deal tons of single target DPS and laugh as foes die from your huge crits, the Rogue is for you.
One thing to note, you are not forced to level your stealth and mechanics as a Rogue, but I would advise at least leveling your stealth to as much as you can to scout ahead in dungeons and out in the game world. Again, you don't have to level stealth at all. You can make your Monk super stealthy if you want and he can scout ahead. Up to you. You can level mechanics, but you don't have too. Mechanics synergizes well with Stealth only because you will be doing a lot of trap disabling and stealthing in dungeons to make your party aware that the path ahead is safe.
Here is a video going over all of their abilities/talents you can choose from up to max level 12:
https://www.youtube.com/watch?v=YrCPYFWpogA