The initial switchback section is great, including across the middle to the post piles. However, beyond that gets dicey. Initially, you will find overgrowth within the rocks past the post pile, making a couple areas tricky as it is difficult to see where the outer edge is trail, a bush, or air. That is the minor issue.
The greater problem is the handful of rock slides (shale) that have blown out the trail on the upper switchbacks (Southwest facing). The first one I encountered was just a few feet of damage, and clearing was relatively easy to find foot holds. The others were worse, where the trail was effectively replaced (blown out) by the slide. One I cleared a bit, the other I had to create a few foot holds, wedge the trekking pole and jump! Any slip and it is 1,000 to 1,500 feet before you hit anything as you slide down to probably your final hiking memory!!
If anyone is planning to train in this area I suggest avoiding this section and using the Jeep trails (Sierra Buttes Rd, Butcher Ranch Rd, to Sierra Buttes Trail) to reach the PCT at the summit (roughly 7 miles in).