Better than expected. As soon as I needed to go to bed I laid down and literally felt the compression in my spine just decompress and at first it was a little painful but thats because I had a old spring mattress I was laying on. After the 2nd night, I can feel blood flowing freely to my legs and my sciatica pain melted away. 
⭐⭐⭐⭐⭐ Id recommend it to anyone who has back issues.