Why not just run your sprinkler zones manually and check them yourself? I only takes a few minutes. The sprinkler coverage can usually be adjusted by just turning the sprinkler head. Whether or not the ad is a good deal really depends on what they charge if they find something that needs to be fixed. If they charge a hundred dollars to replace a broken sprinkler, it is not a good deal. There are several threads on this site with recommendations for reputable companies.
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