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People are listening, but they disagree with you. The build quality is good as well as the performance. It is made of plastic because that is tough and soft (see previous comments about banging into things). You seem to be saying it should be made of metal and glass because plastic is "cheap", but that would be a worse vacuum.

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More than anything else, plastic is light for comparable strength. This is important for something that you're going to be pushing around a lot.

I had a Miele cylinder before this one. The experience of using it was that I dragged it around the flat and needed both hands to manage it. This Dyson model, I point at things, with one hand. It seems to be a combination of low weight, and the ease of pivoting on the ball that means it's rolling everywhere, but the difference is huge.

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