I love it, but not this phonetic spelling.
Most phonetic spellings feel vaguely insulting to me -- as if I can't be expected to retain information once told how it is to be pronounced. Sure, St.
John at first blush does look like it would be pronounced "saint
John." But once told it was really "SIN-jin" then I can be trusted to remember that. (But that's the chip on my shoulder talking.)