Hi Karlin and Klose,
You get a lot more than just a treble clef, although that's what the OP was asking. You get a very refined and subtle complete font. Cadence is very subtle.
I tend to think of Abraham's work as what is called payware in the flight sim world - not commercial greed but some recompense for the work put in, and the ongoing support which is provided. Considering what you get, it's very reasonably priced.
There's a long thread in the archives about the reasons Abraham turned to a payware model, after I and others questioned this move, and it is well worth reading. I'll dig up the link later. I know there are those who hold the view that there is something bad about paying money for any add-on to an open source product, and there is some merit in that, but it's not an absolute given I think. If it means support for the developer, then that's good for the whole community. After all, some of our developers are supported by generous donations - a indirect form of payware.
Andrew