This DLC along with mass transportation really adds a lot of fun in Cities Skylines. Contents within this DLC is worth the money, since it adds a completely new industrial system into the game. With Industries DLC, you would not be building those office zones around the entire city and see "not enough goods" in the commercial zones (if you can manage your industries well). I used to be strict about pollution inside my city (no pollution at all), but now I'm super-enthusiastic about the large industries and transportations required to spread the goods around.

Score: 9/10

Problem: There needs to be a little more improvement in the interconnection between different industrial products, which allows faster and larger-scale production of valuable goods that can be sold to different commercial zones. Till now, you can still see that the industrial resources and products required for valuable goods can only be transported from other industrial zones, instead of you building a warehouse in your current industrial zone and use it to supply the necessities from other industries. Hope this problem can be fixed later, since long-distance transportation between different industrial zones can be extremely slow if your current transportation system is not capable of taking masses of trains or trucks.

Definitely recommend this as a necessary add-on to your game.