Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Very helpful

I am impressed with the resistance of the ring even with constant use. I use it about 3-4 times a week and it's durable and has assisted greatly for my Pilates sessions. I also find the DVD perfect so I don't have to leave the house and drive over to the studio. I've been looking for the perfect magic circle for a long time but I often end up with expensive and easily damaged ones. I'm glad I found this on Amazon and the price is just right for the quality. The exercises on the DVD are performed precisely and well timed, with complete levels of difficulty. The magic circle also does well for yoga sessions especially for people who are dealing with shoulder pains from work-related activities like me. Since my first use of the magic circle, my shoulder fatigue gradually diminished and now it's completely gone. I'm happy I bought it.