We built a workflow design ui with svg under react and for the most part it is an absolute pleasure. Also pretty neat that you can treat the svg as an image/thumbnail. If you need the svg to be interactive, overlaying html works well too.

Example at http://flowgear.me/s/1Ae7Pso if you're interested.

One thing to watch out for is that there are some svg object attributes (and some objects) that aren't declared in react.