I had Landmark Home Warranty given to us for a year when we bought our house. We had the AC blow warm after we'd been in the house for about 6 months and they replaced a capacitor and charged it. $75 was a good deal.
Then our glass cooktop that we had put in when we moved in had a burner go out so they replaced that. Pretty good deal, we thought.
But every year the service got worse up until this year. Our AC downstairs went out in August. They had replaced the circuit board in our AC on two other occasions in the last 4 years. The outside unit fried. This time when the board went out it fried the outside compressor. It took them 6 days to send someone out and the company they assigned it to was out of our service area. 9 days went by before it was looked at and Landmark told them to rebuild the unit, they wouldn't replace it. And it would take another 5 days to get parts.
I told them never mind and went and had another company come out the next morning to replace the unit and canceled my contract with Landmark.
TLDR: Don't do it.
Formerly Willy Wonka