I did this hike just two months ago and regretted it beyond words. I'm a middle aged man in pretty decent shape. Bad knees, but I felt pretty prepared with knee braces and plenty of water. I'm not averse to hiking and usually do a little something on most trips. Don't be taken in by the sexy name! This thing is tougher than it gets credit for. It's safe, but there's a good deal of elevation change with much of it on hard rocky ground. I went from Bomerano to Nocelle, and by the time I made it to Nocelle I was gassed and my feet were hurting. Nocelle is not close to Positano. I could not find the bus stop in town, so decided to start hiking down. Eventually, I ran into another gassed group of hikers I recognized and we waited for a bus. When it arrived, it was packed and at that point in the day I knew I couldn't wait 45 minutes for another packed bus to show up. So, a couple of us trooped down all the way through Positano. This part was lovely actually, and the locals went out of their way to keep us on the right path, but it was endless steps. Just doing the trail would have left me in bad shape, but at this point I was shattered. This was at the halfway point in my trip, and I was ruined for days.
It was on the ferry back to Amalfi that I truly realized what a waste this was. I looked up at the cliffs I had just hiked for the spectacular views, and thought "It's just as spectacular from down here."
Just don't do this, nothing will make me happier to know that someone avoided this hike based on my experience. If you were avid hikers and you were in the area for a week then maybe, but I'd suggest about twenty other things first.