We use primarily Lincoln, the cheap ones at farm stores we threw away, my biggest problem is they grow legs and walk off, none of my kids will tell me which ones they like best because they keep quiet and hang onto them for themselves, I finally bought an air operated Lincoln two years ago and love it, hold the trigger and grease keeps pumping and that stays in my service truck, nobody else has air to run it from their toolbox on their machine!!!!! I wanted to get an air greaser with a 5 gallon pail likes in shops but to get the dirt proof and moisture proof one to put in my service truck was about $1500 plus dollars and I figured I could lose or break a lot of hand held air grease guns for that. My oldest boy did say he liked the lever gun from john deere but he does bleed green so take it for what its worth. Years ago we did buy an air gun from Harbor Freight or some such place, never had power and you had to pull the trigger with every pump of the gun, not like my lincoln, you can pump the whole tube out with one pull, some days we'll pump out a whole box of tubes at one service intervall depending on how many machines are there, gets old in a hurry thats why I wanted a five gallon pail air greaser, anybody have any experience with those, they call them a contractors grease pump, supposed to be dirt and moisture proof canister, are they and will they work in the cold weather, the electric ones will only do about two tubes per battery and have two batteries and are slow, tried them, didn't like them, the older ones wouldn't pump cold grease, kept stripping out a plastic gear but someone said they fixed that problem.