Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Easy to use

I received the 7201 in 3 days. The unit appears to be well made and easy to use. I read all the mixed reviews and decided to order. I thought if mine did not come with a gasket I could make one. I did not open top to check for gasket. I tightened the top screws and tested with water in sink. No leaks, 12 pumps, lots of suction, also pushed the valve to dispense water out of unit. Will try oil changes on Range Rover Sport and two boats later. I gave it 4 stars because I have not tried it on oil change yet.