I workout in home everyday morning. I'm not that much of a gym guy, I workout by watching YouTube videos. I saw a video that suggests a product like this. So, I searched for it on amazon and found this one. I got this before a couple of weeks, I have been using this since then. The quality of the product is really good. The spring is pretty tight, 10-15 reps is the best I can do with this as of now. It certainly made much difference in a couple of weeks. I can see a difference in my abs and muscles, but I also do some other workouts too, this one is an important addition for my workouts. I definitely recommend you to buy this one.