I have purchased 4 tubes in the interval of 3 months and so far the tubes are good. Certain tubes from other manufacturer's I have observed abnormal bloating/ deformation after one or two puncture patches. But these tubes feel of good quality and I have not faced any such issues. I am happy with these tubes.
Continental Race 28 700x20-25c 42mm Presta
Delivered in time and there was no defect in product as well as product packing
V. good tune