The device is simple Spitze.Bin almost daily rely on such a part. Easy to stow away on the truck as nice and small and still very robust. So very solid workmanship, great material (stainless steel) thus not to bend. This was the main problem in the billiegen devices. Once touched hard, and already verbogen.Funktion also very good and finely adjustable. Cartridges also have a secure fit, and are exercised without pressure inserted. In my earlier cheap version when you insert the cartridges, the gas has leaked because the seat was not passent. This gas cooker is absolutely empfelen and also looks great.