Instruct: Classify a given review into positive or negative sentiment.
Query: the dyna disc and me

I purchased 4 discs, 2 for me, 2 for a friend. We use them on our chair when we sew! Usually only one at a time, but always want one handy. Whether we sit on it or have it between the chair and our back, it makes a day at the sewing machine much more comfortable. We both participate in all-day sew-ins and 3 or 4 day quilt retreats, so really appreciate the improved comfort these discs provide. I was surprised at the cost of shipping, but otherwise absolutely happy with the product and the experience!