Did they change the site? Every comment is about having to download an extension before trying out the search engine, but the site works and I've not even been prompted to install anything.
In the final example the handwriting is adapted to the application, and differs significantly from the original handwriting used in earlier examples. Then it goes on to say that the app has everything you need, while needing to learn to write in monospace for it to work.
Being someone with poor handwriting, this would slow down writing for me. A possible answer for this would be to update the expected places for a character by taking the boundaries of previously written ones.