That is true, but I'm the only person on here that orders from there (as far as I am aware) and even if I could cook a perfect one I'm not sure I'd be bothered to start cooking after a long day at work on a Friday. The nice thing is, if you master the Roshney, the CTM is child's play.
Another interesting point he made was that you SHOULD burn the spices at the start. He added a bit of veg ghee to the pan, got it very hot then added the spice mix, salt (tiny amount) and a HUGE amount of chilli powder (half a heaped chefs spoonful). This was then fried on its own for a while before the masala and gravy were added.
Also, he had a container full of pre cooked onion and green pepper. I think they had been lightly fried in g/g paste in advance and left to cool.