In our case, at our main residence, the main purpose of a lift was to be able to stack two cars in a single garage stall, hence a 4 post lift with drive-on ramps was what we needed. Also, with a 4 post lift we did not need a special thickness or strength of concrete where the posts are located. Further, in our design we have a set of wheeled caster devices we can use to easily move the 4 posts to a different location in case we want to relocate the posts. The Brand/Model we got is ProPark 8S (Marketing Document Attached). Also, we got the optional center mounted hydraulic lift, which can be moved along the length of the two ramps. Thus, it is practical to perform any number of repairs requiring the entire to be lifted, or one or more wheels to be lifted.
Although it is nice to be able to work our vintage Mustangs and Shelby on the lift, and stacking two cars being easy to accomplish, the 4 posts do present a bit of a nuisance when it comes to walking around the vehicle due to the limited space in the 2 1/2 car sized garage. The garage was not designed and built over 50 years ago with a 4 post lift in mind. It fits fairly well. our ceiling height is somewhat limited at 115 1/2" (9 feet and 7 1/2"), thus the need for a set of High-Lift door rails, and a side mounted door lift motor used with a torsion bar spring design.
I have attached a few photos for anyone interested in how our lift installation worked out. We are pleased we could get our lift installed, and that we can stack two cars, barely, which is especially appreciated because of the limited ceiling height we had. We got lucky. And despite the challenges in walking around the posts we are very pleased to have the 4 post lift in our garage. We can't recommend the center hydraulic lift options strongly enough. I made the lift become a very practical and useful lift for nearly all purposes and needs. Another auto enthusiast (and new car dealer) recommended the ProPark 8, and we took a chance on following his suggestion. We have absolutely no regrets. It was surprising how low the price was for the ramps, center hydraulic lift, and delivery/installation. We also recommend such a solution for anyone who is low on parking spots, and/or would like to have an excellent lift solution for repair and maintenance procedures.