This bag is not really top quality and smells not so strict for chemical like many competitive products. Unfortunately the advertised weight is not true, however, which was the main reason to buy this bag specifically for me. The manufacturer gives a weight of 500 grams (as of 08/2012) and thus giving the impression that this bag is even easier than the backpacks of competitors Cabin Max (about 600 grams). However, in practice, however, the Travelite bag weighs almost twice as much. This advertising Bluff already draws circles, because some other online retailers accept the manufacturer's instructions and unchecked harvesting complaints about the actually twice the weight. Since the bag otherwise really makes a solid impression and served its purpose, I keep them anyway.
UPDATE: Meanwhile, the manufacturer on its own website at least 800 grams. The product information here and at other online retailers is mainly still 500 grams. Likewise, on the label of the product itself and it look the buyer in a retail store.