Pros
For a startup to really make it big, they have to polish every single facet of the company. Bellroy really shines here, and has amazing processes that makes it feel very super well organised for a small company. There is constant exposure to all of the founders, and they really do appreciate the expertise that you are bringing. I suspect that no proposal would be too outlandish to raise, the team has a rigorous approach that means decisions are made based on evidence and expected impact, so if you really believe something could be improved it will be easy to get the attention the idea deserves. I definitely learned faster at Bellroy than I have at any other company to date, thanks to the constantly changing challenges and proximity to the founders. The culture is decidedly cool, and while people perform their work exceptionally it still feels quite laid back, and it's easy to get along with anyone. If you are a surfer then hitting up Bells Beach in the morning is not unusual, but I personally was a cafe fan and enjoyed the flexibility in choosing when and where I could work.
Cons
There's not a lot of room for uncertainty. If you don't know something, you have to work out how to find it out. If you ask for assistance it is readily provided, but I did not receive as much unsolicited feedback or advice as I would have liked.