Repair warranties are a tough call. Many are just paper and you paid a lot for that paper with no help when you need it. Most warranties (especially on the older coaches) are going to want verification of maintenance, and they won't say that until you file a claim and then they want to see records. An 'exclusionary' policy is preferable to an 'inclusionary' policy, in that it puts in print what it WON'T pay for, but there are a lot of posts on every RV forum about getting ripped off, so read everything carefully and understand what it says.
'16 40QBH Phaeton
'15 38RSSA Mobile Suites--traded
'05 36TK3 Mobile Suites--retired but not forgotten