Hi and welcome to the forum.
This is one of the most debated topics on the forum. As mentioned these are not warranties but insurance policies.
IMHO, they should be looked at like other insurance policies and NOT as investments which you expect to come out ahead on. We don't look at any other type of insurance as an investment and I don't understand why these should be any different.
We bought a seven year policy from EasyCare when we purchased our new 40DP in 2007. I was a newbie and did it for peace of mind... which it provided. As it turns out, my total claims at the end of that period just about equaled what I paid for it... by YMMV.
With the experience I now have, I don't think I would do it again and I chose not to renew it when it expired.
Best of luck
Rick, Nancy, Peanut & Lola our Westie Dogs & Bailey the Sheltie.
2007 Itasca Ellipse 40FD