1Best: I must disagree. Do you know how much the new Ulta Sensitive Ploygraphs cost? $240,000 apiece! And the cost of re-training polygraphers to administer the test runs to $500/hour for 12 hours. To me this is prohibitively expensive and surely not cost-efficient. But bugs.., ah, bugs are very inexpensive. You can bug a 10 room home for less than $400. Another $80 for the family's two cars. And maybe $400 for the black-bagger to install them when the family is out. Bugs are the way to go, definitely the way to go. "Bug America!"