Pros
Great benefits and salary. Nice location. Food and snacks. The company has one product with many flavors (Stata). Full health and medical after two months, and matching 401k after 1 year. Stata uses two programming languages Stata and Mata. The whole of Stata is compiled using C. The Stata language is a Macro language interpreted on the fly. It has good capabilities. Stata is easy to use and the Mata language is fun and easy to work in. Mata has understandable error messages. An opportunity to develop a statistical command from start to finish, including help files and documentation. As a statistician, you will have opportunity to learn or relearn a lot of frequentest statistical analysis tools. Stata is not affiliated with Texas A&M though they both reside in College Station, Texas.
Cons
The computational environment for developing new commands uses the vi editor (on a Unix Platform). Technical support is required to reformat all work to fit 80 columns. (If you are an expert in vi then this should not be a problem). The interface for new Stata commands are developed using the Stata language. Since Stata is interpreted on the fly, it requires exhaustive testing to remove all possible logic errors. Thus, programming tasks seemed very time consuming and tedious. There is not a lot of socializing between individuals at work. It is easy to get isolated. If you want to work in cutting edge statistical tools this is not the place to work. However, if you want code software and you have experience in a production coding environment where productivity appears to be measured in lines of code you should do well here. You will be expected to be productive within 6 weeks after joining StataCorp. While StataCorp hires personnel that do not know Stata, it would be wise to learn Stata before coming to StataCorp.