I talked to my RV Service guy which is good because he is so hard to get a hold of. He stated with profanity which is rare for him under no circumstances to consider the Advent. He states that the brackets are to thin to properly support the unit forcing him to use paint stirrer sticks for added support. They also have a condensation issue that causes water to drip into the unit.
He has also had several DOA Dometic recently and Dometic was difficult to deal with on replacing them. Wanted him to attempt repairs.
He favors the Coleman but thinks he might be able to fix my Dometic for considerably less than replacement. I have an appointment for next week.
I will let you know his findings