If it didn't use final guidance, it's a fantastic CEP, 200m being considered the best the Russians can achieve. If it did use final guidance, it proves it works.
Doesn't mean it will work against a moving target using counter-measures, but it shows they're getting there.
Do we really know what caused those craters and hitting a large area of mud might not be the same as hitting a moving target. A fool would ignore this intelligence but talk is cheap.