Surface Nets for Smooth Voxel Terrain

Hey there all, I've been working on a project for some time now that allows me to create procedural terrain. With the use of 3d perlin noise ive made this work however only with a cube dominated mine craft environment which i would like to smooth.

After looking into marching cubes, tetrahedrons and surface nets I've decided i'd like to try the latter due to performance increases. Does anyone have any experience with this issue?

Thanks for your help, Chris