I’ve started using SbQ myself, and I can confirm that it’s really very promising. After many, many tries, I’m very much in agreement with everything Simone & Kees wrote... except on the question of sizing. This technique, like all others coloides based, requires good sizing (i'm using acrylic varnish - the cheapest, sold at shop “Action” in Europe, works superbly). But you can work with Yupo paper... without sizing.
This emulsion basically has all the advantages we're looking for: very sensitive (10s for me), long storage, non-toxic... It works just as well as PVA-Diazo, with the advantage of shelf life and it doesn't tint the paper at all, which is good. I've done b&w, color and I've also used it on glass (it sticks really well). It should be possible to make gumoil with it, but I haven't tested it yet.
As the technique is still largely unknown, I’ve created a series of videos on Youtube showing the preparation and realization of monochrome and trichrome images. You can watch them here: