Based on this thread, I downloaded and installed Cyclistats. System is WinXP AMD 3800 CPU, 1GB ram. I can compare it with the Polar software that came with my 720i. Quick-look observations based on about 30 minutes of use:

- Basic setup of data is straightforward.
- Importing HRM data files was tedious (I'd hate to try loading my 2005 data one file at a time!). Fortunately, catch-up is a one-time event. I liked the detection of trainer rides, and was able to edit out the bogus altitude data (caused by all my hot air lowering the air pressure in the basement!).
- Display of stats and summary data is straightforward. I still have the Polar software for detailed ride analysis (e.g. killing time when I should be riding!).
- I like the calculators for BMI, BF%, gearing, and power. Roll-out will also be useful. Is the power calculation based on the data and formulas used by Analytic Cycling or published in Bicycling Science? I've found calculators on line for all these uses, but it is nice to have them in one location.

While this software is cycling-oriented, the ability to record and display cross-training, such as weight sessions would be helpful. I noticed I can make a note entry under "health", but the Polar software lets me track it in the calendar. I guess I could create another "bike" called "gym" to capture this data.

I plan to download and install gigabike over the weekend and will report my observations on it as well (so as to not completely hijack this thread).