Pros
The people at Forrester are by far the best asset. Really smart people that care about their colleagues. I made a lot of close friends and continue to keep in touch with them.
Cons
Don't join Forrester if you are a) interested in making money b) hoping to work for a growing company c) looking for stability d) unwilling to play office politics. Every year, and I was there for 6 in a row, there was a new strategy, a revised go-to-market, a new playbook, etc. The constant change at Forrester prevents the company from getting anything done. GFC should step down as CEO, and if ego prevents fully stepping away, stay on as Chairman. They make comp decisions based on shareholder return (not employee retention) and the ego complex - particularly at the C-Level is exhausting and counter intuitive (like GFC's blog) Moving from hip Kendall Square to a forest at the end of the redline is akin to the Titantic hitting the iceberg. It's been a sinking ship ever since.