NewSoftSerial Library: An AFSoftSerial update

ok.
I've seen the code by Jin here http://public.me.com/jinschoi
Jin said:
The code is based on an earlier version of NewSoftSerial, version 2 or 3. It also contains code for RTS/CTS flow control, which I found I needed for my project.

@ Jin can you tell me if it works good, and maybe at what max speed?
thank you,
mario