Icebreakers makes your team more open with each other and it's a definitely great tool for freshman adaption. Saying it as a freshman :)
The best part for me is that this app is a perfect mix of serious & fun. And if "serious" stuff you can always get about people during the working process, insights about their character, favoring and habits not as easy to know. I'm feeling kinda guilty by reviewing my colleagues' social network profiles while we do not even have a talk yet. It feels like spying for me, 'cause I respect privacy even in today's "you-could-find-anything-about-anyone-online" world.
Icebreakers helps to remove these borders and make communication the way much easier