Nicolas Cole says the best digital products solve one clear problem for one type of user. A $99 product handles a single issue, a $350 product tackles multiple complex ones. Don't mix beginners and experts in the same product.
Chapters
The thing that you're trying to achieve with any individual digital product, the goal is to help a specific type of person do something successfully. So a $99 digital product goes, "I help you solve this small problem." A $350 digital product is really just, "I help you solve these problems." It's the same idea. You're just helping them solve more individual problems. Where people go wrong when they think of, "I either need to add more or how much is too much," is they try to help different people at different experience levels in the same product. So if you build a product for a total beginner, you're inherently going to pick different problems to solve than if you build a product that's intended to help someone who's been doing this thing for 10 years.