Was whether the princely price and, handling primarily for DSLRs, described a little skeptical whether the procedure would work in the same way for a mirrorless Sony Nex. But actually has (as recommended in the manual!) A single brushstroke been sufficient to stubborn dust particles from the APS-C sensor my Nex-5R to remove. A bellows (such as the Giotto Rocket Blower) is highly recommended in order to achieve the charging of the Sensor Brush. Before dealing with a complicated wet cleaning of the sensor, I would still give this process a chance first. The "brush cleaning" means little effort and at any time if necessary, go repeatable. Therefore, the product is the price initially acknowledged even worth for me!