1) The font is derived from London-18. Most of the characters found in the London font are found here. There are some additions however.
2) The “ character and the ‘ character have been lowered so they are even with the bottom of text. These are standard German open quotes.
3) The « and » have also been included. These also are used to surround quoted text.
4) There is a new character invoked via option-shift-S. It is one of the lower case "s" characters. The option-shift-S produces the "s" character that looks like an "f". (The regular "s" keystroke produces the "s" character that looks like an "s".)
I might recommend here, that if you use this font frequently, you may wish to move this character to a better place on the keyboard. In my personal version of the font, I moved it to the option-s position and moved the "ß" to the option-shift-S position. This way, the more frequently used character is easier to type, and the less frequently used "ß" is still in an easily remembered location.
In this published version of the font, however, I have left the "ß" in its normal position to avoid confusion. (option-s)
5) The "K" looks funny, and I may eventually revert to a "K" that looks like a "K" for two reasons. One, it is more easily recognized as a "K"; and two, it is more faithfully put into the Macintosh. I chose to use the more common script "K" in this release of the font, even though it doesn't look as good.