If you have a little weight around your middle, it will roll and not fix flat. Not good for a bad back, but it "may" help support weak muscles.
It "may" help you a little and $20 isn't a big loss, but don't expect much. Watch the TV ad closely, all of them have flat stomachs, so the belt fits flat on them and doesn't roll. I wouldn't recommend it.
Bottom Line: No, I would not recommend this to a friend
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