I have used Adobe support for many of their products. I find that they are quick to respond and present a wide variety of support platforms from forums to online chat. Depending on the nature of the issue I am usually able to get resolution within 24 to 48 hours. With more complex issues I have never had a problem with Adobe dropping the ball.
The support provided by Adobe is excellent. Though the knowledge base, forums, blogs and online chat questions most all answers can be found. In the event that you are unable to find an answer or you have a unique situation simply post a question to the forums. These forums are regularly monitored by Adobe and its users.
Adobe Business Catalyst is an all-in-one cloud-hosted system for building and managing web content and on online store. It has a built-in CRM framework, sales, service, and marketing features including eCommerce and Email Marketing tools. It was acquired by Adobe in 2009, five years after the original developers founded a company. It is a content management solution at minimum, and typical web content management features are present --themes, SEO, an editing interface, document management--, but with the built-in CRM and eCommerce it is targeted at businesses looking to sell online.
The yearly pricing plan for Adobe Business Catalyst starts at $10.99 per month with the narrower webBasics+ pack, which includes content management features and site analytics, as well as a hosted email. The $16.99 per month web marketing pack brings the CRM into the fold, as well as targeted email marketing and the blog. The $34.99 webCommerce pack adds the eCommerce solution, and for $52.99 and $71.99, you can expand access from 3 users to 5 and 10 users, respectively. Paying biyearly takes %5 further off the cost, paying month to month adds 10% to these prices.
Adobe has released an end-of-life announcement for Business Catalyst which can be accessed here. New sites will no longer be available for purchase as of June 2018 and Adobe will stop hosting existing sites on Business Catalyst in March of 2021.