All good reasons!There was several reasons why the 4 post was more appealing to me than a 2 post.
1. was because I hate jack stands and the lift arms. I wanted something I could drive onto and lift up, done. If I want to screw around on my hands and knees I would have been born a woman.
2. it doesn't require being anchored to the ground. This was nice because I wasnt sure if my concrete would be up to par since I didn't know it's strength.
3. is portable with the caster kit.
4. It provided more peace of mind when it comes to user error and not having to place the arms under the car each time.
5. resale of the house since I didn't modify the concrete.
6. More points of contact. I'm paranoid with heavy equipment over my head so I wanted something with several fail safes and plenty of balance.
Access to the wheels wasn't a big concern since I've only removed my wheels twice in the past 4 years of ownership and I can still put the car on stands and the drive way ramps. I'm also making a jack tray to hold an air powered scissor jack for occasions where I do want to remove the wheels.
It also doubles as car storage without the fear of hitting my doors on the lift posts.