Outline Diffuse shader and performance on mobile

Hey Guys,
I recently discovered this outline shader, which works really well.

http://wiki.unity3d.com/index.php/Silhouette-Outlined_Diffuse

But my question is, has anyone tried it on mobile and does it work? how is the performance if you use it on maybe 4-5 enemies on the screen at a time? Or is there a cheaper way of doing it for mobile.
Thanks

We are using the Outlined_Diffuse_3. It is a 3D intensive game (> 60 draw calls with many particles), there is only one object using to blink almost every time, we haven’t notice any performance degredation, even in IPod4.

You will only know after test in your app, but I think that is ok.