The unit was at the beginning of the smooth running and good performance in a very positive; After about a dozen missions each lasting about 5 minutes. Then there was a crash, however terrible, and the compressor had with broken connecting rod within one week already a total loss. Of course, one must be in the clear that at this price and this importer no high-quality product but gets a life of in total less than two hours is then but definitely too little. The exchange on guarantee but went completely without a hitch, and since then there have been no problems.