Super part for cleaning my SLR

When I was recently traveling with my SLR, I realized with horror that showed a black spot in the viewfinder. Despite extreme caution when changing lenses, it had managed a medium sized dust portion in the mirror box. How exactly it was acceded I can not say it was more important anyway to get back out before it "migrates" to the sensor.
So I've been looking for a simple and safe method to clean the inner workings of my SLR.
Giottos Rocket Air seemed promising in the description and was therefore ordered by more deliberation.

The "rocket" is about Faust large and is thanks to the ergonomically shaped rubber housing also great in the hand. The typical rubber smell remains a not spared, even if this is not too intrusive in this case. How strong is the discharged air flow naturally depends primarily on the intensity from that of squeezing the rubber body. In order etc. to blow dust out of crevices, the power delivered. One may wonder but certainly not expected.

Miner camera cleaning: First I unscrewed my lens and the camera held so that the bayonet (the opening) is facing down and dust, etc. from falling down. Auspusten After I recently again got screwed the lens and looked through the viewfinder; The black spot was gone.

CONCLUSION:

For my application so right, who wants to liberate or keyboards like thick layers of dust, I can Giottos Rocket Air recommend limited. It always comes up to the expectations.

PRO:
-Liegt Comfortably in your hand
-Wiederverwendbar / Environmentally Friendly
-valve Against dust penetration
-For Most applications sufficient power
-Can Be cleaned with water

CONTRA:
-Not Recommended for CCD Sensor Cleaning
-Gummigeruch

CONCLUSION in grades:

Value for money: 2
Processing: 2
Power: 2
____________________
Total: 2