I have had a cordless tech airram for some years and it always worked well - until the wheels started falling off. I therefore bought the airram mk2 k9 expecting it to be an improvement. However the vacuum cleaner scraped along the hard floors and the dirt and dust clogged up the unit making it very difficult to clean out.
Gtech replaced it and the new one is a lot better although it still scrapes a bit on hard floors.
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