Tired Calves

I've done it, I've walked the Inca trail and survived(just).
The toilets are hideous, the altitude crippling, and the scenery is stunning. It's quite difficult to get your head around the fact that you can only walk about five steps before having a rest, but believe me at 4200m for some of us it's a fact.
We were really lucky to have perfect weather all the time, and the Trek company turned out to be really good. I can imagine that bad weather or bad food and accomodation could make the trek a really miserable experience.
A key skill for walking the Inca Trail is precise bowel control, beacuse some of the toilets were just unusable, and any good ones needed to be taken full advantage of.
Was it worth it? Yes. Would I do it again? Only on the train.