Instruct: Classify Amazon reviews into positive or negative sentiment
Query: I can drive a car comfortably now thanks to this product!

I purchased this product to support my lower back while driving (and to keep my posture!). With a degenerative disc, I have pain sitting in cushy seats, especially car seats. Now that I have this product, I can drive for hours without back pain. Plus, it affixes perfectly to my desk chair so I have the support all day long at work and in the car. It's small and lightweight, so I carry it to friend's cars, on airplanes, trains, buses, etc. It has made traveling comfortable for me.If you're using the strap, make sure to carefully affix the back of the cushion to the velcro on the strap. My only (very minor) complaint is that the velcro ruins the strap itself if the two velcro pieces are not aligned.