Estonian here. The attitude towards the project over here is: "We have have a cool idea which can be easily implemented, so let's see try it out." In essence, no one really knows what might come out of it. As far as I know there has been 16000 sign ups so far of which 63% did it because they would be able to launch a company here. Currently Estonia has approximately 35 000 companies, so this could potentially become very profitable to the country if done right. Assuming the project will hold security-wise, of course.