I recently took my father to 6flavors and I noticed that their food is a bit spicier than the Americanized Indian restaurants I'm used to. The default level of spice in most of the dishes is along the lines of a jalapeno. You can add some of the red chutney to increase the heat, but I don't need it and neither did my dad. The selection of chicken and vegetable dishes was very good. I was impressed with the selection and the flavors. Too bad they don't offer a dinner buffet.
The chicken tikka masala was delicious as were the other dishes, which I do not recall the names of. I will definitely be back. Loved it!