The Bottom Line:

"Amazing"

The Bughunt DLC is very fun and totally worth it! Here's why:

The two multiplayer maps are fun and provide a different environment with multiplayer stories and interesting camping spots (for marines). Furious is a cool map with the furnace in the middle, a great place for a trap. Both maps are very alien-friendly.

The two survivor maps are what I think make the DLC worth it. If you don't like the survivor mode, then don't buy this map pack. Monument is a cool map where the aliens can come at you from any direction. A cool addition is the alien spitters you spit acid at you from various directions. Tempest is so far my favorite map in the game. It is located in the colony area of the story mode, with buildings surrounding you. But the coolest part of the map is the environmental elements. As you fight off endless swarms of aliens it will begin to rain (a lot!). Also, at the beginning of each new wave is a ton of fog, which really hurts your vision of the surroundings. This map is very intense and provides you with a lot of fun!

These maps are all very fun, though the survivor ones are what (imo) really make this DLC worth it.