June is pretty awesome! We were using it in our B2C startup for quite some time. I especially enjoyed the live events feed (seeing what's happening in the product in real time) and reading individual user's events on their profile.
I also found value in looking at was the main dashboard with DAU numbers and the breakdown in between new and returning users. If you're a new startup or don't work with data yet, this is a must-have!
Sadly in our case as B2C we outgrew the free plan too fast and we had say goodbye to June 😢