Forced to move to more regular meetings, I decided to invest in the BEURER IIH20. Auvcun regret. The space is not very important, so easily portable, traps for storing electrical cord and accessories are just as convenient but flaw; The only downside would be the noise, but it's still a compressor, and therefore logical for those who do not like the provided masks (adult / child + + mouthpiece nasal), know that the mask sold at the chemist fits perfectly the outlet nozzle (same diameter pipe) j'e've tested. In conclusion, I recommend this product to 100% as effective as the devices previously rented for my asthma.