Some guys claim to wear it for hours at a time while working. They must be in the clown industry, because that's the only set of pants I can imagine wearing that would cover the
SG. When I am wearing mine it is over halfway down my thigh...
I have 3 young kids, and a demanding job, which means that I have to get a good session when I can. This usually means I may get an hour or so in the evening, plus a couple of 30 minute sessions throughout the day. All in all about 1-2 hours a day.
It's really comfortable, and I don't get the problems that other guys seem to talk about - blisters etc. It's a really great mod, and I find that I get a fantastic lig stretch.
Hope that answers your question!