The idea is very, very clever. The only character that visually is difficult yo read is the "I" (that can easily be interptreted as a "J") and - to be picky -

The idea is very, very clever. The only character that visually is difficult yo read is the "I" (that can easily be interptreted as a "J") and - to be picky - the "S" is too similar to "5" (but this latter can be easily solved by rounfng a little bit more the "S").