reasons I got a 4 post in order of importance.
I don't own my unit. I cant mount the 2 post to the floor properly and don't really know if the concrete will handle it even if I just did it without asking.
If I have to bend over theres a roughly 30% higher chance I wont do it
kneeling down to get the lift arms in the right place just seems like a pain especially when working on my rice rocket daily drivers.
I got the rolling bridge lift so I can still get the wheels off the lift.
Im going to use it to store my truck up out of the way when im not working on it and then when its done when its not on its way to home depot...