I had one for 3 years, the first year came with the NEW house. I have also done some extensive research on this subject, but I'm feeling lazy tonight so I will answer with no, NO, nope, don't do it, no, no, nono, hell no!
It has also been proven that some sites with rave reviews, (like 90% positive), were FAKE!!! 900 of the 950 reviewers were from the company employees posting anonymously , LOL.