MI is an amazing place to work with fun people and an environment that challenges you every day. You dictate your own path.
Cons
Because you dictate your own path you are given enough rope to hang yourself. If you take on too many projects and to much work and then do a mediocre job, you will not make people happt.
NI is a very employee focused company. The ELP program in particular is a fun place to work with an almost frat-house like culture. Austin can't be be as far as living in a cool city.
Cons
There is a major consensus based decision making culture and the company is extremely conservative with risk. As a result, some very ambitious or entrepreneurial type personalities may get frustrated.