W&N Galeria Matt Varnish - the Holy Grail?

I was in an art store over the weekend and I thought I'd give an artists acrylic varnish a try since I've been struggling to find a varnish that I'm entirely happy with. I've tried both brush on and spray Humbrol Matt Cote, Vallejo Matt Varnish and Miniature Paints Matt Varnish to name a few, but none have really made the grade. They're either too satin for my liking or they frost up (in the case of spray varnish). All i want is a good varnish that doesn't need absolutely perfect environmental conditions to go matt! So I gave this stuff a punt:

So far I've only tried it on the face of an Orc I had sitting around, but it turned out very satisfactory! I'll paint up a test figure soon (a rank and file type) and give it a proper test by gloss varnishing first. I'll make sure to post the results, but I'm hoping that the initial indications hold true and this stuff will turn out to be my matt varnish Holy Grail!!