Pluspunten
Top management is very stable, has long term vision, executes well and is very capable. When faced with tough business conditions over the years, they have reacted in rational and thoughtful ways rather than just resorting to layoffs or short-sighted (and ultimately, useless) cost controls I've seen at other firms. They have stayed the course and kept to the plan rather than reacting in panic to quarterly results. A nice change versus public companies that live and die by what Wall St. says. Being privately held allows for a lot more freedom. MATLAB and Simulink are well known products in their markets. In some markets they are the undisputed champion, in others there is stiff competition. Allows for a mix of pace setting/holding the course for some teams, more of a startup environment for others. Office environment is nice, for many positions you get your own office with a door that shuts. Those who work in cube farms and build elaborate defense mechanisms against distractions will love this. Benefits are quite good. Vacation, health, etc are all nice. Profit sharing takes the place of stock options or other such programs and delivers cash into your bank account rather than useless slips of paper that never vest, or that get underwater. Managers are generally OK with flexing hours and are not clock-watchers. Some people come in early and leave early, others come in later and leave later. Same for appointments that happen during the day. Nobody tracks if you had to go to the dentist for an hour or run an errand. The path from doing support (EDG) to working internally is fantastic. You learn the product and the customers, and then put to work internally in another department. I've never felt pressure to check email or log in outside of working hours on any regular occasion. There have been a few times I've needed to work late or on a weekend, but there was generally a very fine and justifiable reason for doing so, and those occasions are most definitely exceptional and not considered a part of day-to-day operations.
Minpunten
Telecommuting policy is "there is no telecommuting". If you are the kind of person who doesn't mind commuting, this won't be a con. But Route 9 is godawful at rush hour during school months, as are most other roads that get to Natick -- the Pike, 128, even the surface roads devolve into a traffic Armageddon around rush hour. Management does allow some schedule flexing, but when you add things like getting kids to school, life may not afford such schedule flexing. Transferring positions within the company isn't very straightforward outside of the EDG route. If you want to switch jobs after doing something for a while, the process can be very tedious. It's not exactly clear what it takes to get a promotion or raise, aside from going from a fresh college graduate to someone with some experience. There are defined job levels, but there's not a clear set of goals to go from one level to the next level. There's a large pool of people who get to one level and then stay there a long time.