My dad wears a back brace with shoulder suspenders at work. He told me that the brace has saved him from a lot of injuries in the past. I think it's a little uncomfortable but he doesn't mind.
I think one of the most important factors when purchasing a lower back brace is to make sure that it is adjustable. The ones that wrap around the back with a strong hold are the best. Braces aren't very cheap so one should last a long time. Adjustable ones can be used by multiple family members as the need arises.