This is my first 4-post lift, and overall, I am very pleased with the purchase. The unit is solidly built, and the welds appear high-quality and clean. Just a heads-up for DIYers: this thing is incredibly heavy. You will definitely need a few friends to help with the assembly.
Crucial Tip: Do not rely on the printed instructions included in the box. They are vague and will leave you with more questions than answers. Download the digital version from the website instead; it is much more comprehensive.
Power Note: I purchased the 110v motor, which is rated at 28 amps but can spike up to 40 amps on startup. If I were to do it again, I would spend the extra money for the 220v version to avoid the high amperage draw. Aside from the power spike, it works great!