I have a pair of Giotto blowers - the Q.Ball (CL 1102) and the large Rocket (AA 1900). Of the two, the Rocket blower gets almost all the use. Why? Well, simply because it's easier to squeeze and emits a far more powerful stream of air than the Q.Ball. The one advantage that the Q.Ball has over the Rocket is that you can tilt over the nozzle, which probably helps to prevent dust from falling straight into the blower when its left standing on the bench. However, if you have to buy one blower, unless you have very small hands (in which case, the small rocket is probably favourite) I recommend the Rocket and not the Q.Ball.