xcoder - 5:32 am on Sep 19, 2012 (gmt 0)
Piwik has a Goals tab which you can use to track conversions
It also has a referrer tab where you can track ad campaign clicks, keyowrds etc.
A true state of the art tracking software, comes with a widget board where you can drag and drop a range of various real time reporting widgets and build your own kind of reporting board. It all seems a little complicated at first but once you get used to it you learn to appreciate it... send me a PM if you need any tips.
IP to country translation is slightly off though. A quick plugin update takes care of that...
You can have both installed (GA & Piwik)...makes no difference.