TrainingLog is the only MacOSX program that downloads data from the new Polar series (S610, S710, S720 & S810) - using the Polar IR interface and Keyspan USA 19QW USB-serial port adapter. I have tested that it successfully reads data from my S810, and I have verified that the data exactly agrees with Polar PPP software for PCs (Polar does not provide any support for Macs). For this feature alone, the program deserves 5*'s. However it is still in beta and not yet bug-free, so I take away one star. The training diary part is a nice clean design with the right features. TrainingLog has all the making of becoming a great Mac program with a bit more work.