Instruct: Classify a given Amazon review as either positive or negative.
Query: My Back is Very Grateful

I picked this up based off reviews from Amazon.com and random google searches. I bought it for my office chair as it has little to no lumbar support and sitting in front of a computer all day leaves my spine aching. It's been great! The versatility of the strap means it's much more adjustable than the pillow/pad like supports that I had around the house which never fit quite right. The only downside is that I have to readjust it to my posture but that's definitely not a dealbreaker.I loved it so much that I purchased another for personal use but unfortunately it doesn't add as much support when the chair is already sloped for lumbar support. This item sloped with it so it didn't add as much support as I would've liked. But, again, not a dealbreaker for me.PROS- Great support- Strap makes very easy adjusting for proper heightCONS- Not designed to enhance chairs already with mild lumbar support (it slopes with it)- Height needs to be re-adjusted semi-frequently