Well, "good" is a relative term. I ran 42 minutes without any pain and only noticed the shin a couple of times. I didn't have the acute pain I had when I first hurt it though. It was just an occasional discomfort like a tight muscle and not really in the same area. If I keep my mileage low for a while, I think I should be OK. A March marathon looks unlikely. I'll probably use Cherry Blossom as my goal race (closed out in 4 hours!) and run a May marathon as an afterthought. I set a huge marathon PR last spring without a lot of angst beforehand.