I have become hyper focused on the app and what it can do and how, rather than getting things done! That’s a major con for me!
The reward facet is crucial for me and the personalization is a black hole. I think I need a better tutorial and/or the ability to format text as I do when entering text in Notes. And rather than icons and fonts as rewards I think stickers of praise and encouragement that pop up with the quotes would be more effective.
I came here looking for how to adjust my font size within a list. I found a tip that worked partially. So I continued to look for more information. Which led to reading way too many posts. Which led to creating an account. Which led to getting messages. Which led to needing to read and clear them. Which led to completing or adding to my profile. Which led to realizing I’ve now spent 45 minutes on this rather than working on my list! Which led to creating this post. Which in the exact opposite of what I thought your app would help me do. 
This sounds very critical and that’s not my intent. This has been part of my experience so far and I hope it is valuable feedback. I also hope that others will respond with answers and instructions on how to better find answers. 
Thank you. I hope you have a blessed day!