Judging from the look of the finished example part, I'm not impressed. Some massive gross porosity.
It would need to be pretty porous to let the vaporized binder material out. Are any strength figures available for it?
Limited application for rapid prototyping but not production, even to ignoring the printing time disadvantages.
My reaction too. For decorative or arts objects, it adds an antique type effect. I am sure there are many uses for even this level of slightly crappy. For instance, 3d printing of prototype, test, or temporary parts for plastics is huge. The costs and time involved in molds is a big factor in product development. Metal quite a bit different I am sure, but I would think for some applications this is a big step. Also the possibilities in glass and ceramics. Additionally, the product works in 3D pens, which is something I am very interested in.
Porosity. Exactly what I would worry about.
I was going to ask what “extracting binder” meant exactly. Apparently, it really does leave a porous object.
This would have to be accounted for regarding weight, strength, etc. Many projects rewpquire knowing characteristics as lowly as the weight of the object, much less strength.