The Milescraft 750 is a good little pump for moving significant amounts of water. It's advertised as a "drill pump" because it is intended to be attached to the chuck of an electric drill for its power source. As others have mentioned, you can pretty much forget using a cordless drill, unless you've got a very small pumping task. A corded (plug-in) drill is a better choice, and a 1/2" size will do the job better than a 3/8" one, due to the greater power it has. In my application, I coupled it to a 1/2 HP capacitor-start ac motor, because I wanted a relatively compact and self-contained plug-in pump unit for cleaning out my small ornamental pond, as well as other general purpose water transfer tasks. The rubber vanes on the impeller inside this pump have a tight fit inside the housing as they rotate, which makes the pump very effective but also requires a lot of torque to get moving from a standstill. The manufacturer applies a thick grease inside the pump to help reduce the rotating force required, and also recommends applying more of it (or a small amount of light oil like mineral or cooking oil) before each use of the pump. Obviously, oil and grease would not be desirable floating on the surface of my ornamental pond, so I pumped a bucket full of a Simple Green and water mixture through it before using it for the pond. In an application where the pump inlet does not have water directly applied to it before startup, such as a vertical lift and/or horizontal run between the pump and the water source, the length of the inlet hose should not be more than a few feet so the water doesn't have to travel very far to reach the pump, and can get there in no more than several seconds. This type of pump relies on the fluid being moved as a lubricant for the pump itself. Since it consists of rubber vanes rotating inside a plastic housing, you can understand why others (who obviously ran it dry too long) mentioned that it didn't work and smoke came out of it! Water that contains any type of hard or abrasive particles should be avoided, as well as any debris that could get trapped between the rotating vanes. I piped a standard residential water filter housing ahead of the intake port of mine, to collect the algae, plant particles, etc. and prevent them from entering the pump. One error in the specifications for the pump (although not a serious one) is that the shaft diameter is listed as being 3/8". It is actually only 5/16". If you're driving it with a coupling like I did, the size is definitely important to know accurately when obtaining the coupling hub for the pump side. Also, a urethane spider will handle the torque much better than a standard rubber one. All in all, as long as you operate it within the limits of its design, I don't think you can beat the usefulness and performance of this pump for the price. I'm adding an update, and reducing the rating to four stars...when I took the pump out of storage to use it the first time in 2022, I didn't follow my own advice about making sure to prime it. I just hooked a four foot inlet hose to it and dropped it in the water, then turned on the motor. I waited a only a few seconds for the water to come out of the discharge hose, but that never happened. Although the pump shaft was spinning, I discovered that the impeller was not moving. Upon disassembling the pump, I found the teeth of the plastic driving hub on the shaft were totally worn off, and the mating teeth inside the rubber impeller were also destroyed (see the second photo). Since the pump sat for six months without use and was bone dry, the impeller probably got slightly seized in the housing. The manufacturer's recommendation to apply a little mineral or cooking oil inside both ports before each use of the pump would definitely apply to the first use after extended storage, and it's my fault for not taking the time to do that. As a result, my pump is ready for the trash can. I still think this model is useful in the right application. I won't be buying another one, because it's a little too tedious for me to make sure it is cared for correctly, and that's the only way to be sure that it will function when you need it.
