This product is best used at least every other day for maximum benefit. I recommend 30 repetitions both in the morning and before going to bed (3 sets of 10 repetitions with a brief pause between the three sets). You may not notice a significant relief in back pain or more flexible back muscles until using it about 3 days, but you will still feel some degree of relief immediately upon using the stretcher. It is great after a long drive. My girlfriend loves using it after she drives 4 hours to see me and her back is killing her from the drive. Even my roommate asks me to use it when his back hurts. With the adjustable headrest, it works great for both my girlfriend who is 5'1" and for me who is 6'2". After about a week of using this stretcher, I noticed my abs were beginning to tighten up as well. This machine does not take up too much space, but it cannot be stored under a bed even if it was slightly disassembled. Overall, this simple product serves its purpose (to stretch your back) and it quite effective
