I had no problems fitting it onto my 6qt Kitchen Aid, as it is the same size as my normal paddle mixer. Its seems to be made of a high quality plastic. The style I purchased has a spaulta like tool all around the paddle.
It was cold and rainy today, so I decided to test this baby out with cookie dough. The beater does scrape as it mixes, but with the cookie dough I felt that it smooshed it up against the bowl. Once I was done mixing it, I still had to go back and try to scrape it off the sides. I think the beater was created to use with thinner batters, such as cake mixes.
Oh and this is what you look like when you turn on your mixer at high speed with flour in the bowl. (I got a new haircut over the weekend....what do you think?)
Right now I feel as though I can't make a strong recommendation, because with the cookie dough it didn't really work as I had expected. Next time I making a cake I will try it out and see if it does a better job. I really want to like this, because the concept is ideal. Also, I paid $29.99 for mine plus tax..