A mate of mine bought a Focus RS there, said they're good guys. Someone on the forum bought a stage 4 from them last week and was very pleased.
Mind you, they're buying a lot of GT-R's at the mo, and I enquired as to how much they would give me for mine (out of curiosity as I'm p/xing it next week with another dealer) and they quoted 6k less! I would guess on that basis they have quite a large profit margin.
If I was you I would deffo ask for a discount, say what you'll pay and walk away, there's plenty of cars to choose from.