I asked the developer of this plugin whether it could handle a specific task, and he promptly replied that he thought it could. I immediately purchased a license.

Minutes later, I received another message from Christian that he had done some research and some testing that revealed that the plugin could not, unfortunately, do what I needed on the Windows platform.

He promptly refunded my money (even though he loses money on the deal) within hours of my e-mail. This is excellent customer support! Many other companies would have made it a lot harder to resolve the problem.