Performance is perfect for our use. Since it was electricity so far, it is wrong to compare it, but it is heavier than I imagined, so I need to be prepared. (Currently I use it while supporting the diagonally through the belt to the handle part.) Mileage is never as good, but if it is this price ... I am convinced. Although engine performance is not bad at all, I think that loading of grease part is a little more lucky, or if tubes similar to grease guns are attached (I think that it is better to buy grease gun for this product only, bulk of the tube If you can inject from grease ...) Also, it is convenient to have bags for mixing, beakers etc. (as it may not be accessories).