Pros
MTS has a world of expertise under its roof and as a budding engineer there's endless learning available. Technical specialists are encouraged. Compensation is above average and benefits are good. Work-Life balance can be very good. Accessibility to management is good for a medium sized company. Employee longevity is extremely high for today's business world.
Cons
Employees are very nice and knowledgable, but it's not a social crowd unless you're already a long-timer or well-embedded (a Minnesotan trait). Lacks some large-company benefits like well-defined career development programs. Steep learning curve for technical disciplines, so it takes 2-3 years to become fully proficient - not necessarily a con but something to be aware of.