Product has a strong market fit with ample opportunity. Colleagues are dedicated and foster collaboration to make sure everyone is successful. Awesome culture and a work-hard play-hard environment.
These people believe in what they are trying to achieve. They work hard (and play hard) to create the kind of work culture that makes coming in every day easy.
Cons
Start-up culture can be really busy at times- to rectify this and keep everyone on the same page there is a weekly meeting with the entire office to debrief, offer constructive criticism and applaud those with big and small successes.