It shadows onto, but not from, dynamic meshes. So anything dynamic will receive shadowing and look fine. Besides, most dynamic meshes tend to be smaller (in many cases) and thus SSAO should be fine for shadowing from them.
A lot of runtime taken up for a totally nondirectional and low res ambient occlusion solution I must say. But supporting some form of dynamics is still pretty good. Plus its smooth and has no popping sampling issues like probes can get.