I picked up The Division on sale, wasn't quite sure what it was going to be. When I started playing it, I didn't really like it that much. The first couple of side missions were pretty quick and easy, but then the first real mission (the barricaded police station) was much more difficult. I must have played that mission 20 times or more before I beat it. Part of the problem was that I was still figuring out the game, learning how to find and use all the different things hidden throughout the game map.
I don't like that if you're playing a mission and have to quit the game for some reason, you have to start over at the very beginning of the mission, instead of at the last checkpoint you reached. People have lives and shouldn't be penalized for having to occasionally leave the game.
Now that I've leveled up quite a bit and have gotten some good weapons, the missions aren't as tough. I still get killed once in a while, but I'm enjoying the game a lot. It is quite addictive, completing missions, finding loot and upgrading your gear and your base of operations.