Yes, G-Adventures was who we went with. Fantastic company. They really looked after us. We did the trail in three days, giving us the opportunity to stay in a hotel in town on the third night (thank you, Lord) and went back and explored Machu Picchu on the fourth day. Great food, great people.
I went with my wife and two kids (20 and 22). The trail was one of the most challenging things I've ever done. At times I thought that I was going to die (day 2 dead woman's pass), but I enjoyed every minute of the incredible vistas along the way.