matt the power packs are a god send,you can store it in the car between the seats,the air compressor is a bit naff (coz you have to turn it off after about 10mins)to cool,had mine about 3 years,there are better ones out now with better lights ect,and once yove neighbours know youve got one you will have em all knocking on your door to borrow it,but all so buy a decent set of jump leads coz if you break down(you know you sholdve put the pack back in the car after cleaning it)you wont be stuck. regards gregers