Just wanted to share my experience thus far using my GSM as travel guitar. There has been much discussion but not many actual stories. In September, my wife, myself and some friends took a trip to Stehekin WA, on Lake Chelan. Travel involved our car, a seaplane and a boat trip. The mini was easy to pack along, fit in nicely, and was a joy to have along. I spent several mornings on the deck overlooking the lake and playing just for the joy of it. Much needed down time!
Last week I took my first trip with it on a commercial airline. Though the plane was small, the GSM fit in the overhead with no problems.
I have been taking it to work with me daily since buying it and being able to have a guitar when I am alone and have a few minutes to practice has really improved my playing. Is it going to replace my Martin? No, but as a travel instrument I have been impressed with it's quality and it's sound. It is going to stay with me and be my go to travel friend.