I read all the reviews that I could find, and they were almost all good for the model of my choice, but a few people mentioned that it was "heavy". I thought how heavy can it be it should be fine, and also it had a good dust filter which my Kirby didn't so maybe my house would be less dusty.
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I worked with a lady who always said, "Horses sweat, men perspire and ladies glisten." Well, I guess I'm no lady because when I vacuum with my new machine it sure feels like I'm sweating. I do about 1 room, and it is dripping down my face and off my hair. A rest, and then 2 more rooms and another wet paper towel. So on until I've finished our relatively small home. We keep the air conditioner on too. I told my husband that it is harder work than mowing the yard and I'll use it as long as I'm strong enough because it must be good for me. I do a lot more up and down, getting under and behind, and dusting this and dusting that, so maybe eventually our house will be less dusty and I will only "glisten".
PS Thank goodness for Ibuprofen, because today I'm just a little stiff.