We had a great time on the Inca Trail . It's tough and physically challenging but the views get better every day and are spectacular.
The porters are superhuman freaks who can run the ridiculously rocky and steep trail with a ton of stuff on their backs. They start after you each day, pack up the tents, cooking gear and bags and still get to the next camp site with enough time to set everything up before you arrive for lunch and again for dinner.
The guides are friendly and knowledgeable, and totally one hundred percent committed to making sure you have a great time. A once in a lifetime experience.