Took a minute to learn how to switch the jack from locked position to released (ready to lower back down.) Also, we saw a YouTube video where the user built a tripod to help counter the tendency of the jack to lean as you use it. Instead of building the tripod, my partner muscled the jack to stay in place. I could not have done this by myself. I will build the tripod to save his muscles in the future. After the first six posts, the jack started switching to the released position mid-jack and it would slip on us. We learned that if we connected the chain on the opposite side of the release mechanism, it would not slip. This takes a minute to master and there's very little info on the manufacturer's website. Not many YouTube posts for this model. Hang in there! We had previously spent 3 weekends digging out posts. With the jack, we pulled18 posts in two hours.