I've never had the fabric move once it's on the die going through the machine. The fabric stays on the die the way you put it on. Lots of great videos on You Tube showing the different dies being used. The straight of grain of the fabric is important when cutting strips. The other shapes I pile on fabric anyway it will fit to make die cuts. I don't baby the machine I use it to the max.
I guess it's just me but if a product I want to buy is from a reputable company, I know getting too many opinions from good to bad would stress me out about buying. I buy first and form my own opinion.