This tool has been on the job with me for a year and a half and I use it multiple times a day. My boss uses a second one that we bought and his is maybe a month newer than mine and he uses his daily as well. These two we use for evacuating oil out of the crankcase of all sizes of generators from 8 kilowatt up to 250 kilowatt units. I just ordered another one that I intend to use for putting fresh oil back into the generators after evacuating the old oil so this one will have only fresh oil in it.For evacuating oil we used to use an electric pump and a large 5 gallon tank when I came on board to the company. I used this method for a short time and it was cumbersome and sloppy. Powering the electric pump was sometimes not possible and we resorted to using gravity on those units which is time consuming and you run the risk of the small pan overflowing if not emptied before filling. There had to be a better way so I researched on the web and zeroed in on this product.I have become very proficient on its use and the main reasons for continuing to use it are time saving, jobsite neatness, and ease of use in that order. Generators, unlike automobiles, are a stationary machine and so our customers can't drive them into a repair bay for us to work on them. We have to travel to where they are and once there, we have to carry our tools and equipment to where the generator is located on the customer site which can be a great distance away from the service vehicle, sometimes on the roof of large buildings. This thing is a lot easier to deal with compared with a pump and 5 gallon jug.Pictured in my post is the setup that I made to connect to just about any oil drain port and is currently connected to a Kohler 10KW water cooled generator. The previous time that I serviced this generator I had to pull the hose off from the fitting that I'm currently connected to on the inside of the generator and connect it to a barbed fitting on the end of my hose. The barbed fitting and ball valve are still on the end of the hose but now is connected to the adapter shown. It turns out that Kohler uses this method of oil draining on many of their generators with solid metal housings. When my adapter is not connected, there is a standard automotive drain plug there sealing that port. Nobody at the company used the port. They would loosen the hose clamp on the inside of the case, pull the hose off requiring a considerable amount of effort and then use the hose to drain from. It is so much easier using the port. This 10KW unit pictured is really cramped for space inside the case and you have to be a contortionist to get to and loosen the hose clamp and then get the stubborn hose off of the barbed fitting. What a time sucker that was. I include this description in my review because many people tend to use a product as delivered. The fitting in the picture fits an automobile drain hole. There is a whole series of that fitting for just about any oil drain port in the crankcase pan. Notice also that there is a ball valve on that fitting. It is intended to be placed in the drain port on the oil pan and then left there for future maintenance. This may be helpful information for some users and potential users of this product.Now I turn to the durability of the product. It speaks for itself about how durable it is that my unit has gone through almost two years of daily use multiple times a day. I have had only one issue with it that I consider minor, that I solved myself. I started noticing a steady stream of air bubbles in the evacuation hose while in use, not evacuating oil, but disbursing it into the waste oil tank. It puzzled me for a while but I suspected something inside the tank was leaking the pressurized air above the oil and it was making into the exit tube. When I disassembled the top of the unit, I discovered that the tube that the oil enters and exits through is a loosly fitted pressure fitting that is just inserted into a hole in the container top. I removed the hose, added 4 to 5 layers of teflon tape and then reinserted the tube into the hole and reassembled the top of the unit. No more issues with air bubbles. BTW, this lowers the efficiency of the work that you do to evacuate the tank if some of the pressure is escaping during evacuation of the tank. Should the fitting be air tight from the factory? Absolutely! But you have to deal with what you get and I wasn't about to send it back because of this minor issue. Both of our units did this, and I expect the one that I just purchased to do the same unless the factory finally figured out that the pressure fitting was too loose on the inside of the unit.Finally, I really enjoy my job. I retired from 35 years of teaching in an occupational education program in computer repair and networking. Being outside every day and solving problems are very satisfying aspects of my job. That includes solving issues with my equipment. I can't say enough good things about this pump. It is awesome. If my original one should break, it owes me nothing and will be replaced immediately. If that did happen, my clean oil unit would be immediately switched with my unit for use with dirty oil and then the new unit, once it arrives will be used with clean oil. I try to anticipate problems. That's one of the things that my boss likes about me. When he hired me, he let go of three others.So, get out there and get to work.....using this workhorse!