Pros
Loona has an amazing product that users love, which makes you proud to be working there. The startup culture is very much family-like, where you feel connected to others, appreciated and want to do above and beyond in your day-to-day life.
Cons
Same reasons can also be applied to cons - because it is a startup, expect many corners to be cut - some benefits that are common elsewhere won't be available; distributed team may make you feel less connected to the rest of the team; some political turbulence in the management makes the company feel unstable.