Are Nike Free Run + shoes worth it?

My dad is turning 45 this August and he has been complaining about his shoes being too heavy (even though they're very light) and I was thinking about getting him a pair of Nike Free Run + shoes for his birthday. But he doesn't really run a lot, he is still on his feet a lot because he is a full time janitor. He is on his feet about 8 hours a day and I was wondering if the Free Runs would be good for him, even though he wouldn't be running in them. I tried the Free Runs on and walked in them for a couple hours and they killed my feet, but maybe they would be good for him? Please help!