The best thing about this service is that it makes managing my openstack installation very easy to use. I am able to quickly create new virtual machines without having to do any of the work myself. A couple things i dislike are the price point for the subscription model and how difficult it can be to learn how to manage the system. It's not too bad though once you get used to it. We needed something that made it easy to setup an environment in which we could quickly test out different versions of linux distributions.