I have been on parts of it over the past few months. They had logged sections near 462, between there and the Fire Tower cross-over, so trail markings may be messed up by their equipment.
From the campground to Pioneer Cabin was good when I rode it a couple weeks ago.
We marked the trail between Pioneer Cabin and Cold Friday with a few more signs in January, and cleared some fallen limbs, etc. but that was five months ago.
Be prepared for an adventure. Carry plenty of water and cache some along the way, maybe at the Cold Friday and Old Forest road cross-overs.