OK, just got back from my first trail run. I go on these with no expectations, no Garmin, not even a watch. My goal was to run at least 80% of the time, and I did, albeit probably not much faster than I can hike!
The shoes will work. It took me awhile to get the laces at the right amount of tightness where I tie them. I tend to err on the too loose side, because my feet are so damn sensitive. But, I felt some movement, especially in my right foot, so I made them tighter. This is with the laces done up with the special "extra hole" trick, as I have narrow heels. Nothing hurt, except my injured toe, but that has been aching a little in the past couple of days, in a minor way.
It's horribly humid out, kind of spitting. I doused myself in Deet, praying no tics got me. Next time, I am going to drive to a different trail. The beginning of my neighborhood trail is too wet and overgrown, and with the branches laid out, so you don't step in the mud, way too slippery for running, at least for me. I could access the trail by going down the steep hill to avoid this, and then doing a slightly different route to one of the spurs. All in all, I think I ran 2.5-3 miles, walking about 1/2 mile down the hill to the access point. I did not go on the trail into the next town, as it's very overgrown and wet, despite being an open field. If I do that, door to door it's 4 miles.
I'll probably feel this tomorrow, but right now, it's good.