This is an excellent product in my opinion. I originally bought a small grey 'puffer' style blower (with a brush on the end) from a local photographic shop, with the aim of removing a couple of small hairs that had managed to find their way into the mirror mechanism of my digital SLR. Rather than clearing away the hairs, the 'puffer' actually deposited yet more hairs from its brush. The small 'puffer' was absolutely useless. On looking through the Internet, I came across the Giottos Rocket Air Blower which I thought I would try. The product delivers a good, strong puff of air, which is still gentle enough to remove hair/dust from the inside mechanism of my camera. It worked first time and all of the hair (and brush hairs that the inferior puffer had deposited) were gone. The Giottos product was definitely worth the money.
In terms of its build quality, the product is built using strong, thick (but obviously flexible) black rubber. The air nozzle at the top is red rigid ABS plastic with a small hole through which the air is delivered. It can deliver both a gentle or strong puff of air, dependent on how hard you squeeze the body of the blower. In terms of application, according to the packaging, it can be used for computer and communication equipment, traditional and electrical musical instruments and photo, video and precision optical equipment. The packaging says 'Not recommended for CCD sensor cleaning'.
Overall, a good, solid product and money well spent in my opinion.