I like almost everything about this unit. I feel much safer having this portable power supply in the car with me. I live in southern California and we have lost our house to an earthquake and have been evacuated last year due to the fires. Having something like this is just peace of mind when you have to leave your house unexpectedly in the middle of the night. It has about everything you can ask for in a portable power unit. I took of one star because the jumper cables are very sort. I know this saves space, but some new cars have batteries that are very hard to get to.