How can we compate VCS/HA with other Clustering solution in the Market

Asking why someone chooses to pay for VCS over using "free" native tools from the OS vendor is always a fair question. The best answer may be another question: Why do so many people choose to pay for VCS when they could be using something that's free, or at least less costly?

The answer to that is simple in that you get what you pay for. OS vendor-supplied solutions are adequate, but who wants to entrust their most mission-critical applications to something that's merely adequate? Then, too, we could get into an hours-long discussion over features and capabilities in VCS that render the cost difference irrelevant.

I'd be more than happy to help if you find yourself having to defend VCS against any other HA cluster solution.