Former automotive mechanic and now a design engineer. I have used a lot standard floor jacks, speed jacks, semi jacks, etc. I haven't ever used an ATV or motorcycle jack. I looked at Menards, Home Depot, Lowes, Walmart, O'Reilly's, Auto Zone, Car Quest, even Harbor Freight and read as many reviews as I could.What I found are a lot of cylinder issues and structural issues. I even read about disappointments due to mistreatment like compaining about cylinder bleed down /creep over an extended period of having units jacked up. I disregarded those comments. Use jack stands and the safety latches built into most units. Car lifts use the same mechanical stops. Most of those have never fail designs that must be manually switched off. This unit has that mechanism as well.I noted right away that the jack itself is packaged to lay on it's side when the box is rested on anything other than the smallest ends of the box. It leaked oil and the box was stained from hydraulic oil.Assembly was easy.Read the directions on how trial fit the use rather than trying instantly use it and found the hydraulic system needed refilled and bled, just like any other hydraulic system. No problem, 5 min later the jack was being used.Structurally, it performs as required. The four bar linkage, as designed, looks exactly how I would want it designed. The safety latches are designed appropriatly and have various heights that make sense based on suspension travel. Hydraulics system is correctly sized.I would recommend this unit to someone looking for a smart buy who understands that ATV jacks aren't as commonly sold as standard floor jacks and may need to be adjusted after delivery due sitting on a shelf for an extended period.