Pros
Thomson Reuters employs bright people. The company strives to be best, sometimes succeeding. The culture of Reuters, with it's acknowledged leadership in editorial and information services over 150 years together with Thomson's more sales-focused approach makes this a genuinely great place to work.
Cons
The tough economic climate for financial information businesses and the decreasing unit value of raw data over the past decade forced Reuters to almost 'run on empty' for a few years. The acquisition by Thomson provided some financial stability - particularly the wider market focus into Legal, Scientific, Tax and other information areas. The downside is that old Reuters culture has been lost to some extent. However, if you didn't know the 'old world' it might not be an issue.