they are stiff enough to be a good all mountain ski, but it also depends on how much you weigh. if you are lighter, t hall might be a better flex. also ar7 is more of a jump ski with an even flex, where the t hall is more of a jib ski with a slightly softer tip and tail.
I love the ar7 i mounted miine at center and they are great for freeriding and also shred the park. the flex is awesome stiff under foot and soft in the tip and tails. mine are still pretty new and in the break in stage so it does take awhile to be able to use the nice flex that the ar7 has.