I have purchased and monitored most of thses systems of the years.

Without exception none of them show anything but a hefty loss over the long term if you follow them mechanically and bet each selection blindly.

However there are great angles and ideas in most of them so you can't help but learn.

Finally if you do your own analysis and filtering on the selection thrown up you would do better.

The best thing these guy have come up with is the Retirement Staking Plan (more of a money management plan).