Around Christmas time, I spotted this in my local chemist. At nearly €10 it wasn't the cheapest of impulse buys, but I bought it regardless just so I could see if it could live up to my beloved Holy Grail brush cleaner [Daiso].
The ingredients are mostly water, fragrance, foaming agents, preservatives, and parabens. It essentially has the same ingredients as cheap shampoo. It doesn't contain alcohol. It claims to "Improve Brush Performance" - well that's the least you'd expect from a clean brush, of course a clean brush will perform better than a dirty one?!
I found the texture really weird - like a thick jelly rather than a gel, it was actually quite hard to get out of the bottle - it sucked itself back in unelss I squeezed it really hard. It also has a strange sweet smell. I tried it on a Jessup kabuki brush and it didn't shift any of the foundation off it. I tried it again with a Blank Canvas brush - same thing. So I tried it with a Real Techniques brush.
Surprisingly, it worked on the RT brush.
This isn't what it says it is. There's a video explaining how to use it [here] and the girls say that it's for a deep clean, not a spot clean - I'd argue the opposite. I think it works as a spot clean on brushes that have only been used once or twice. This won't shift cream or liquid foundation, nor liquid eyeliner. Really disappointing, not a patch on Daiso, and not worth the money. It doesn't do what it claims to do - Avoid.