Disclaimer - I have never bought from Cruise America.
As with any extended warranty, make sure you understand the full list of eligibility requirements and exclusions, on the CONTRACT, not the brochure. I personally would consider it, as long as there's no gotchas on the contract, simply due to the prior usage and age on their units.
For how many units Cruise America sells, I really don't hear any complaints about their used units. On the contrary, they seem to have LESS problems than most NEW RVs. Partly because they have simpler, more robust builds, but also because they've also already common workmanship issues that come out of the factories.
