Pros
I've worked at Quantcast for nearly 6 years, and have had a lot of great experiences here. I've moved up through the org over the years, and always felt like i had the leverage to make a real difference throughout the company. Great vacation plan especially for employees who have spent 4+ years here, they get 5 weeks a year, employees here 2+ years get 4 weeks, and starting is 3 weeks. also get 9 sick days and 10 public holidays in the US. Great training, and ongoing development for managers. Top notch people, hire really great, passionate, kind, talented people for the most part . everyone i've stayed in touch with that has left always cite this as something they wish their new company has.
Cons
Career pathing needs clarification especially for mid level employees (IC's and Managers) who have been around for 3+ years and worked their way up through the company to that level. lack of 401k matching, the company offers stock options but that's not liquid nor guaranteed money (though we all hope it is worth something, someday). for the 5 years I've been here that's been one of the largest asks from employees in terms of benefits.