Freshly juiced fruit?

Hello!

I'm looking into getting a Slushi and I want to ask some questions before I dive in and buy. I have a lot of dietary restrictions, and I'm wondering how it may affect the efficacy of the final product.

I cannot have any processed sugars (HFCS) or artificial sweeteners due to allergies. I try to avoid anything with added sugar in general minus some raw sugar or maple syrup time to time.

Does fresh fruit juice slush up decently in the Slushi? What setting results in the best slush for fresh fruit juice? Do I have to add extra sugar to get the right consistency? What are the best fruits to juice for a slushie?

What are some of your favorite fresh fruit slushies?

Also, I saw a frappé setting. Does this mean I can make frozen dessert coffees? Would using maple syrup as a sweetener alone help the consistency? How well does it work with oatmilk?

Thank you!! Sorry I have so many questions!!! I would absolutely love to have one of these machines as long as I know it's worth it!