Articulating mirror or not?

I want to get a mirror for my tower and was wondering if i should go with an articulating mirror or not. What are the benefits to having either? Thanks for any input

im sure most of you have mirrors, what do you think?

I got an articulating mirror arm last season. It moved around until I tightened the heck out of it. I got it just for preferences sake. I think if you had an odd shaped tower an articulating arm might be able to get a better angle. I think the best feature on mine is the arm rotates at the tower mount. That was the hardest angle to get right when installing it.