I had one, and I had luck with it, but it was all bad luck. It gave different readings in the same spot when I'd test a few hours apart. Sometimes just rechecking a few minutes later.

tweedbunny - the test is worth it, if your getting other information. this is what I received for $67 CAD;

That was from a lab mind you.. we don't have county extension offices in Canada.

Your extension office wants that much money just for a Ph test?????

Those pH testers generally are not worth the price. I have seen some of them test vinegar and report a pH of 6.2, a baking soda solution with a pH of 6.3, and straight chlorine at a pH of 6.0.
What state are you in?

You can get an extensive soil test for $15 from a quality testing laboritory.

As a general rule, if your pH meter does not need to be calibrated using stock solutions it is not worth messing with.