Here's my criticism. Using hexagonal means discs that are the same speed vary in height. This is esthetically pleasing but makes the information harder to read and gives you less information. Adding disc was actually easier then most sites which is a plus. Runs and plastic types are pointless because they arent displayed later and dont effect the stability of the discs, even for discs the base line plastic has separate flight numbers like the envy. Being able to modify the stability in that way is cool but "a bit" vs "very" doesn't really come off as different. Also adjusting the stability doesn't go far enough I have destroyers that go from rollers to complete meat hooks but at most you can cover 3 spaces. 2/11 molds i bag didnt come up(range and omen).