Having all the paints makes this kit very handy (and cheap when you consider the cost of the 4 paints individually), and the final outcome looks very good. It was lots of fun making it and I'm glad I spent the money. You may need to shave a bit of plastic off some of the pieces to make them fit snugly but this is the only reason I gave this kit a 4 stars instead of a 5.
As a side note, the paints that come with the kit are different to those shown on the picture – the actual paints are black, brown, light green/yellow and deep green, the traditional Spitfire colours.