I found the idea presented in the paper useful and interesting, but i agree with the Markus in that that paper did not provide enough details. Furthermore i think that the two GUI tools that were developed were not so interesting. Although i have not installed them, i assume they are nice little toys, but i question their usability. The features used where well defined in the paper, but the way these were selected was neglected. I think it would rather be interesting to have a system that automatically selects some features; later, these selected features could be analyzed.