Really cool llooking chop, really fun idea there making it look like a toycar. Works great for the X-mas theme of it.
So lets start with the design, whish is just awesome. It would stand it's ground at any carshow I have ever been too. I have seen that sort of S-type styling on the side of the car a lot of times, but this is one of the best. It all boils down to your choice of lines, and I think the ones you made added fit really well with the rest of the car, this makes the styling look like a part of the car rather then some added stuff. The FB and SS also look really good, just not sure about those black carnard looking things on the ss. They look a bit fake, but I really like the idea of adding those black pieces as contrast against the red. Makes the red pop more, and also makes the whole of the car more interesting. That goes for all the black details, like in the interior, the black hood (guessing carbon lookalike) and so on. Rims also look great, and fit with the overall styling of the car.
If we move over to execution i'd say this is high quality work, especially on the side, really nice and slick. It was also smart of you to put the gits outside, since the refs on the car reflect the sky and such, otherwise that had been an issue. The stuff I can find if I do this analysis really anally is that there are still traces of the old background around the spyder tunnels and the back, and the side-exhuast (?) behind the front wheel is a bit lowres.
Overall a really cool chop. Nice to see some X-mas chops!

Great job.
Cheers!