I should add some more provisos here.

If you are thinking of taking the test, think long and hard about the implications of making your DNA available to others. You may want to research the implications.

Also, if you've seen the ITV series 'DNA Family Secrets', you'll know the power of DNA matching. But you'll also know they work very closely with genealogists to process the results. I don't want to give a false impression that this process is easy. It'll take several days if not weeks to process what I've received. Some genealogists offer a paid service to explain the matches.