Well, I mostly like the additional maps of the Terrain Pack. But I really don't understand, what this is supposed to accomplish (look at the picture...). I experienced that already earlier in the game, where I at least had a rocket launcher tank with me. But I think, it's just kind of unnecessary. I can only imagine one situation, where this might come in handy: Chryssalid-mission, where you don't have any flying suits in use. Otherwise, this is just blocking your way out. Which then forces you to throw grenades to get out, which unnecessarily endangers your units, as they have a tendency to drop, where they aren't supposed to.