After researching the product extensively, knowing to look for common faults with these bands, I'm very happy with this purchase. Very good quality, durable and does what it should. The bands/tubes are strong and heavy duty. The grips and straps are great size wise and quality. I've heard some people mention they have broken bands - I'm not sure if they overstretched them or needed heavier bands for their use, but these seem like they'd be really difficult to snap if using correctly.