Let's face it. You have quarterly numbers to make, and this all depends on convincing people to buy your product. If your lucky, you can sell to existing customers. But every sale needs to be made. On a subscription model the experience matters, and is what will make customers stay.
The easiest way to delight your customer? Handle them with care and attention, pro-actively. In a service relationship, customers expect you to be frequently in touch and help them. This is a great source of learning.
Delight them up front. Pair your product with the things they need to get up and running instantly. This can be anything that increase the value they get from your product. Additional content, service moments or replacement parts.
People's life change, and needs shift with it. They might need more, or less of your products. With a product as a service model you can change with their needs, providing flexibility to upgrade or downgrade their plan.