Does Home Warranty worth the money?

Home buyer faces the question of home warranty all the time. Does Home Warranty worth the money?

Some people have some good experiences but most don't. The three most famous home warranty company are:  American Home Shield, Old Republic, and First American Home.

Here are some real life experiences (from online forum):

Person S: "Bought all three before but none of them is good. Won't buy any more."

Person I: "Old Repulic is waste of money. Paid the co-pay for a problem and then told me that it won't cover it."

Person B: "Old Repubic is a scam:
The plumber went there, check, and then say insurance denied coverage because it is a missing washer or something on the faucet that is hard to find. Then the plumber charged $150 for replacing the kitchen faucet, and I still have to pay copay.

I suspect the previous plumber did that a few months ago for the same leak..."

Person S1: "First American = Waste of money"