Speed is good when you're one of a few winches in a group and you have to winch every jeep over/through an obstacle. Speed can also be dangerous, especially when winding my M8274 back up at 74ft./min it'll get your hand if you're not very careful.
The MileMarker electrics are made in China, so the reliability is spotty. You can get lucky and get a good winch that will last years, or the motor could burn up after two hard pulls. Same with the Ramsey 'e' line of winches, and other bargain brands.
If you want to it work good when the chips are down, stick with a proven winch like Warn. It'll last decades and the product support is great. My Warn is a '76 model, still working strong with original parts except cable and controller.