I have used Kwik Fills for a long time now with no problems what so ever. I don't like fuel dots because I think they are messy and when you get fuel on them they are slippery. I have seen people spill fuel on the ground because they can't get the plug of the fuel dot back into the line. I also have a friend that is elergic to the methanol in the fuel and the kwik fill allows him to re-fuel his plane without getting fuel on his hands. I like them and will continue to use them because they are easy to fill the plane with and there is NO mess.