Own three of these after nearly herniating an L3-L4 and L4-L5 degenerated, bulging disc. Two years after the injury, I have pain after sitting for about 30 minutes. If I use this while sitting, I have no pain at all. I also use this while weed wacking now, and it works wonders. Have not had any issues, pain, or sciatica and I have recommend this to many friends. Purchased my first one from wal-mart, but afterwards ordered from Amazon. I have three around the house; one for mowing/cleaning, and two for taking to work. Best back brace I've used with a triple velcro latch so that it gets really tight.