When we were looking to upgrade in 2013, we were focused on used Newmar Mountain Aires and Essex. I wanted a coach that was considered more high end but still supported by a manufacturer that had survived the economic hard times. During our search we came across the coach in my signature and just was really impressed with build quality and features. Rode and drove like a dream. Even so, I was concerned it was an 'orphan.'
I learned quickly that there is plenty of support for CC owners. CC is back in business in Oregon for service, tech support and parts and there are many independent quality service centers that were started by former CC employees. There is a fellow named Kevin Waite in Oregon who, along with his BIL, are former CC master techs who offer unlimited tech support and parts acquisition for a reasonable annual fee.
I get my chassis serviced at my local Cummins Coach Care center and a local independent RV service has done a few things for me that I could not do myself.
I am sure we would have been happy with an Essex, TS or others but we have not regretted getting the CC.
Entegra certainly has developed a loyal following. If you read the Entegra forum on IRV2, it seems a number of folks started with the Aspire or Anthem and traded quickly from Aspire to Anthem or from Anthem to Cornerstone, which is their flagship coach. It also seems they have some growing pains and some quality issues but no more than most others. For now, I understand Entegra does not offer factory-based service for anything other than warranty repairs, unlike Newmar. That is supposed to change as they add capacity at their factory.