With all due respect to those that choose to use a cement curbs and lasers to park, let me offer this alternative. I saw this posted somewhere else on the forums and this was also mentioned in an earlier post on this thread.
The MS has a perfectly useable rear camera that can be used to determine when you are far enough into your garage. To set the up for perfect parking every time, I simply parked where I wanted it to be. Then took some painters tape and put in on the floor at the rear of the car where it can just be seen by the camera. To use this I just turn on the backup camera when pulling head first into the garage. Once I see the tape I know I can stop. I did the same thing at the back of the garage in case I want to back in. In that case I used some neon yellow paint once I was comfortable with the tape mark.
Of course, I don't have issues lining up side to side in my garage so maybe I am just oversimplifying.