For me the bright white background is overwhelming. Maybe it is my monitor but it is very harsh. The cars could also be a bit sharper. Good luck. a 4 from me.
Nicely presented. Looks like they are standing in the sun in stead of on a table top.
I suppose that the white background has been obtained through PS (or similar application). The shaddow beneath is car is a little hard and the cars are slightly OOF.
The more I look at it, the more I have the feeling that the pp didn't let the photograph turn out as it should.
As you've effectively asked for comments (is it working?) here's mine.
I'm not voting because I'm in this challenge, but I think I would have given you a 5. I like your subject and you've photographed them well, but I think the composition lets it down. I feel you might have been better separating the cars more and having them facing diagonally across the image - that way you would have the large area of negative space at the top.
Hope this is the sort of comment you're looking for.
I love Hot Wheels! Some of them seem a bit out of focus and the car on the left has a bit of the original dark background showing. I have problems in post processing too... looks like we need practice. Good composition overall.