Pros
Best in the business at marketing and promoting themselves as the experts in marketing measurement.
Cons
A total house of cards. Results are manufactured so the client hears what they want to hear. The statistics being used violate every math rule imaginable. Data collection and the technology stack is exceptionally terrible - at least 20 years out of date. If you like being told 1+1 is 3 and then learning how to sell that, this is the place for you. I feel sorry for new college grads who are told this is analytics. It’s not, it’s classic management consultancy disguised as analytics. Finally, I’m truly impressed Forrester has these guys ranked above all the other shops who take modeling and objective research seriously. But, I must admit this house of cards client deliverables are second to none. They literally have mastered the art of selling garbage. So from a business perspective I tip my hat to them, but this is not for me or any serious analytics professional.