Pluspunten
HubSpot is very good at hiring, which means that everyone who works here is smart, talented, and driven (& on top of that, really fun/interesting people to spend time with). There are also a ton of opportunities to learn & grow your career: training sessions, $5k/year to spend toward continuing your education, Toastmasters for public speaking training, etc. I've found that managers here are genuinely interested in helping you grow your career & specifically don't want to pigeon-hole you in the position they hired you for. The philosophy is that if you're good, they'd rather keep you at the company & move you into a position you're happy about rather than see you get frustrated & leave. Also, the flexible working hours/work-from-home policy is awesome.
Minpunten
People work really, really hard here, so the pressure is on pretty much all the time. Very much work hard/play hard. It's not for everyone.