RAM EJ-3520-WBX 3,500 lb. Electric Trailer Jack with Drop Leg - White, Durable and Efficient for Trailers

I have only had this for 2 months, so I can only report immediate results -- not long-term wear. So far it has proven a very capable jack. I installed it myself in a few hours, and it worked well from the start. It raises and lowers faster than I would have expected, and beats the heck out of cranking. Also, the leg cotter pin is intelligently designed so to be easier to use than some. From experience, I know that moisture getting into the unit can be fatal to it, so if you buy this, for longest life, you will probably NEED a waterproof cover -- I would recommend the BougeRV 600D Universal Trailer RV Electric Tongue Jack Protective Cover (Size 14″H x 5″W x 10″D) which fits this perfectly and is also available on Amazon for about $10. Also, if buying this jack, I would recommend getting the 4-year protection package. It's a pricey (but very useful) item, and, for the small cost difference, you'll want to be sure to get at least 4 years out of it without having to buy another.