Works great! (sort of...)
UPDATE: Im currently having an issue with DTMF. When I dial into any automated menu systems, I push the keypad but the other end does not get anything. I know its not an issue with my SIP server, because all my other iPhone SIP clients work fine.
Not the best looking application, but after trying iSip and Acrobits Softphone Im sticking to this one.This application has been solid. Great call quality and great sip phone. I like the echo cancelling level you can set in the config, this is an option when using speakerphone.
Gizmo5 set up is easy, just goto the developers site for settings.
spencecl about
WeePhone SIP