Pros
At HubSpot the sky is the limit, anything really is possible. As someone who started in the support department I've seen that first hand. There is no better way to enter HubSpot than through support, you learn so much about the customers, the products and the culture, better than anyone else working here. With that knowledge you have an opportunity to make a huge impact in almost any department. The key to HubSpot is making connections with other people in your department and other departments early on. Get involved with projects that you find interesting and where your skills are needed, even if they don't necessarily pertain to your current role. You can't expect to move into a new role but simply doing your job in support or in any other position for a year or so. It's not enough, everyone at HubSpot is incredibly intelligent and talented and the ones who advance most rapidly are the ones who put their hands up first and figure out how to get the job done.
Cons
Sometimes the work-life balance thing can be challenging, but having a gym helps, being able to work out midday is awesome. The flexibility of working from home whenever you want to/need to is great and unlimited vacation is a real thing! The work hard play hard mentality applies very strongly at HubSpot - if you operate with that attitude already, it helps!