On the attached picture you can see how large the characters are compared with the standard characters.
The display can show four characters packed closely or three characters separated nicely. The library will be ready for download soon on my blog page:
See the attached video. The library is based on my previous work of the phi_big_font, which displays large characters on character displays. This library is ready for download. Check it out too:
In the video I've used a phi-connect shield to bring all Arduino connections to the bread board, which is very convenient. Check out my instructables on how to use the phi-connect.