For all those with Polar HRMs that use SonicLink to upload data to a computer (S410, S510 & S520) and have a Mac there is now native mac software you can use to upload your data and look at it graphically etc.,etc. It's just a Beta right now but most of the functionality is there. Software is just as good if not better than PC Coach software that you get with your unit. It also supports the IR transfer models (Polar S610, S610i, S625x, S710, S710i, S720, S725, S810, S810i, XTrainer, Accurex II)... oh, and there is also a PC version as well.

iSmart Train with SonicLink support Beta
iSmart Train Web Page