Wearing a lumbar brace is certainly not very comfortable, but it is much better than the alternative. I have a lumbar support brace that I wear under my clothes because of back pain from compression fractures.
Once you get used to the brace, you don't think about it as much and because it is worn under my clothes, people don't even realize I have it on. The times I try to go without it for awhile, I can tell, so have got in the habit of wearing it as much as possible.
It is better to deal with a little bit of discomfort from the brace than the pain I have if I don't wear it on a regular basis.