Normally, I pass on extended warranties. It is as AW said. Money is better spent on repairs. And that may be the case for the AS as well. However, we have the warranty in the binder. We have bad luck with refrigerators. We will not travel without a working ac unit and we like hot water. We like a warranty to leverage a dealer to do good work and truly expected to have problems with the AS. RVs are known to have reliability problems. So when the dealer offered us a break on the warranty, we sealed the deal. That may not be a good idea for you.
No reason that you should feel the same. We have actually had very good performance from the AS. The Boise dealer seems to have done a good job with the original prep and systems are working well.
If you are a do it yourself person, you might want to pass on the warranty. If you tend to use the dealer service department, you might consider the warranty. If you are stretched for funds, pass on the warranty and use the money to travel. If you can afford a bit extra, are good with pressing an organization to honor their commitments, and need the labor of others to keep you on the road, consider it......but see if they'll reduce the cost a bit.
One final thought. There are dealers out there who should not touch a trailer for any reason. No clue who or where they are, but unless you trust the dealer's service department to do good work, you might consider keeping the money in the bank so you can use other service facilities to get your repairs performed.
Good luck. Safe travels. Pat