Like many have said, it can be a double edged sword. If the owners are straight shooters who are directly involved in the day to day running of the business and encourage honesty and open dialog, it should be OK.
I have worked for some highly eccentric self made men and in some cases the "seniority" system always won out. The employees who were there back in the day when it was a 5 man operation instead of what is now 30-40 man operation still have sway in the joint. I have battled over outdated job card systems (now MRP), methods of handling cost vs price, inability to delegate / empower people to accept responsibility and with it consequences to crazy things like not being permitted to listen to the radio in a very quiet office environment (not at all), being penalized 1/4 hour for clocking out 1 minute before the hour, when the entire shop is standing in line doing nothing but waiting for the clock to chime and on and on.
I was "sold" to one of our largest new clients after I started a design and project management department and the value of business brought in for design and project management outgrew the rest of the business in 1 year. The owner started having nightmares that I would "get run over by a bus" and he would be left holding the can. He hated not knowing how to review my drawings to figure out if the product would go together and work (a fear based on countless bad experiences with design people who had no idea what they were doing). I never did draw anything that didn't go together or work, but the problem was that in the back of his mind, every next job might be the one.
After I started work at the client, I found vendors in Germany who would make the same products for 1/3 of the price he was getting and so when I started shipping the work out to Germany he got real mad and wanted me "recalled" but my new boss would have none of it...
People are always full of surprises....