The instructions leave a lot to be desired, but the product is great. A nice looking unit, but function is obviously the important part. First, I expected to pull the spring and lock the rod into a rear cutout. I was pleasantly surprised to see the rod locked in place with a lever, not a cutout that wears out or gets easily damaged. After loading, you hit the lever and release the rod. Second, the fine threads on most guns are shallow and fine, which are easy to cross thread. This gun has well defined threads and are easy to engage. First time priming was easy too. I did have to back the barrel out 1/2 turn and heard the air squeezing out. I tightened the barrel and I was primed. The gun worked perfectly. I purchased a quick connect, however there’s one thing they don’t mention about the included tip. You can tighten and loosen its grip on the zerk with a twist, like a drill chuck. I didn’t use it, but I think it would work fine. The rest of the included hardware is nice. The loading and use was clean and the only place the grease went was where it was supposed to.