Yeah I’ve more than tried.
I imagine that you went back to this subject because you read the articles I gave to you (Multi aperture interferometry) 
Results are encouraging and the method I’m developing in my thesis partly use this. Double difference interferometry is a kind of MAI for lvl1 S1 SLC data only on burst superposition areas. The goal is thus to infer azimuthal displacements. I created the subject because I was very surprised SNAP implemented it, because almost nobody uses this technique. What do the developers had in mind when creating this?
I don’t want to share now my results but as we are almost neighbors, we will probably have opportunities to meet and talk about that in the future (EUSAR, IGARSS, EGU, AGU, … ) 