I went on one in my 2nd year and personally got loads out of it. I think the more effort you put in, in terms of moving out of your comfort zone, the more you will get back. It's hard work though, so be prepared for that. The group exercises can seem a bit 'cheesy' at the time, but looking back I can see how they relate to the real world. I think you will have fun. I did mine in Windermere with half a day of outdoor stuff which was great. Plus it was a free trip to the Lake district! Enjoy!