My experience as well r.e. the reviews. You'll get emails of people wanting an extended trial or wanting your app for free, or threatening to rate your app a 1 star review. When you contact Shopify about this problem -- they simply tell you to "work with the merchant." Being almost 1 year into this, and having app that's now finally paying my bills, I'm feeling that I am just becoming another Shopify tech support person. My next venture/app will definitely be outside of this platform.

Also, Shopify's free themes are all terribly slow. Kinda ironic considering how hard they're pushing us recently with new storefront app performance requirements.