I haven't experienced aiming issues. There are frequent claims in this regards but there is seldom evidentiary support for the claim. I am not asserting that those making the aiming issues claims are incorrect but simply that most claims are not supported so I cannot determine whether they have valid claims.
My best advice to anyone who is wondering is to buy a $30.00 HID kit from EBay or some inexpensive source and try to see how you like it. The install can be very, very temporary so easy to decide for oneself.
"We've got no money so we've got to think."
Ernest Rutherford the father of nuclear physics.