Pros
As with any of these anonymous boards, the bulk of the entries are going to be from unhappy and/or disgruntled former employees and any positive reviews are deemed "suspicious". I would take all comments with a grain of salt. If you are really interested in working here, contact the company and gather information. Talk to others who currently work there and get their opinions.
That being said, my experience at Resodyn has been a positive one. Resodyn is a small company, it is not a university and it is not a large company. So if you like to blend into a larger setting, this may not be the place for you. This is not a place where you can coast. As in all small companies, everyone needs to do their part and if you are not pulling your weight it will be noticed. The work is challenging but rewarding. If you work hard here, it pays off. Innovation is held in high regard and you are able to take your ideas directly to the company president rather than having to go through several levels of management. You are surrounded by top notch engineers, scientists, and professionals who open your eyes to new ideas and provide input on your work. For instance, they would alert you that the year cited in the basis for your argument was incorrect - before it was posted :) It's a great place to work and full of opportunity. Montana is a beautiful place to live and raise a family. The company also provides a very generous benefits package.
Cons
A small company atmosphere is not for everyone.