Is it ok to use in-app features in the main screenshots in the app store

Is it ok to show features that will only be available through an In-App Purchase in the main 5 screenshots in the Appstore?

In the Appstore I'm describing all of the features the app has and what it can do but I'm not specifying what features are not included in the free version, in fact the 5 main screenshots also show In-App features.

Is this considered a bad In-App Purchase model? If yes, how else should I let the user know what the app can do before downloading it?

Thanks