Pros
As a young company, there is a lot you can do/be trusted to do here. The good news is that you can probably be involved in and learn a lot more than you're used to at other jobs––the bad news is that its age makes it a company with a lot to prove, so coasting (which I would define as clocking in and out and performing your minimum requirements) isn't going to cut it. If that's what you want, you're gonna have a bad time. If you're looking to stretch yourself personally and professionally, this will be a much better match. I've had the chance to sit in on all kinds of discussions that I wasn't able to before. I've learned a ton about product, design, business, marketing, and legal, all of which is outside my job description.
From a sales perspective, the earning potential is high.
A younger company also means management is good at trying to attract/retain talent, so if you prove yourself valuable and full of initiative, there are friendly people waiting, snacks in the kitchen, drinks in the fridge, at least a couple social activities every month, etc.
Cons
Benefits aren't great yet, but I know that's actively being worked on as we continue to grow. Sometimes the smaller body of people means it's hard to find someone available to help with something you can't handle. That's not anyone's fault of course, as all the department heads probably put in 80 hours/week––it's just something you have to factor into your workflow.